AWS-GP-demo-4.ipynb

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   "source": [
    "# Greenplum Database  Concepts Explained (Part 4)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "This is Part 4 of Greenplum Database  Concepts Explained, ***Table Storage Models***. \n",
    "\n",
    "- If you missed Part 1 (*Setup, Describe Input Dataset & Data Loading*) or wish to repeat, then click [here](AWS-GP-demo-1.ipynb).\n",
    "- If you missed Part 2 (*Basic Table Functions*) or wish to repeat, then click [here](AWS-GP-demo-2.ipynb).\n",
    "- If you missed Part 3 (*MPP Fundamentals and Partitioning*) or wish to repeat, then click [here](AWS-GP-demo-3.ipynb)."
   ]
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     "text": [
      "1 rows affected.\n"
     ]
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       "<table>\n",
       "    <tr>\n",
       "        <th>version</th>\n",
       "    </tr>\n",
       "    <tr>\n",
       "        <td>PostgreSQL 9.4.24 (Greenplum Database 6.12.0 build commit:4c176763c7619fb678ce38095e6b3e8fb9548186) on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 6.4.0, 64-bit compiled on Oct 28 2020 19:42:15</td>\n",
       "    </tr>\n",
       "</table>"
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      "text/plain": [
       "[('PostgreSQL 9.4.24 (Greenplum Database 6.12.0 build commit:4c176763c7619fb678ce38095e6b3e8fb9548186) on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 6.4.0, 64-bit compiled on Oct 28 2020 19:42:15',)]"
      ]
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   ],
   "source": [
    "import os, re\n",
    "from IPython.display import display_html\n",
    "\n",
    "import pygments.lexers\n",
    "from pygments import highlight\n",
    "from pygments.formatters import HtmlFormatter\n",
    "\n",
    "CONNECTION_STRING = os.getenv('AWSGPDBCONN')\n",
    "\n",
    "cs = re.match('^postgresql:\\/\\/(\\S+):(\\S+)@(\\S+):(\\S+)\\/(\\S+)$', CONNECTION_STRING)\n",
    "\n",
    "DB_USER   = cs.group(1)\n",
    "DB_PWD    = cs.group(2)\n",
    "DB_SERVER = cs.group(3)\n",
    "DB_PORT   = cs.group(4)\n",
    "DB_NAME   = cs.group(5)\n",
    "\n",
    "%reload_ext sql\n",
    "%sql $CONNECTION_STRING\n",
    "%sql $DB_USER@$DB_NAME {\"SELECT version();\"}"
   ]
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     "text": [
      "1 rows affected.\n",
      "Done.\n",
      "1 rows affected.\n"
     ]
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       "<table>\n",
       "    <tr>\n",
       "        <th>gp_autostats_mode</th>\n",
       "    </tr>\n",
       "    <tr>\n",
       "        <td>none</td>\n",
       "    </tr>\n",
       "</table>"
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       "[('none',)]"
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    "query = \"SHOW gp_autostats_mode; \\\n",
    "ALTER DATABASE {} SET gp_autostats_mode TO 'NONE'; \\\n",
    "SHOW gp_autostats_mode;\".format(DB_NAME)\n",
    "\n",
    "%sql $DB_USER@$DB_NAME {''.join(query)}"
   ]
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  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Done.\n",
      "Done.\n"
     ]
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     "data": {
      "text/plain": [
       "[]"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "query = !cat script/7-db-maintenance.sql\n",
    "%sql $DB_USER@$DB_NAME {''.join(query)}"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 7. Comparing Table Storage Models\n",
    "\n",
    "Re-create the Amazon Reviews table, using 2 different table storage models, row-oriented and column-oriented, as shown below:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
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       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">DROP</span> <span class=\"k\">TABLE</span> <span class=\"k\">IF</span> <span class=\"k\">EXISTS</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_ro</span><span class=\"p\">;</span> \n",
       "\n",
       "<span class=\"k\">CREATE</span> <span class=\"k\">TABLE</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_ro</span><span class=\"p\">(</span> \n",
       "  <span class=\"n\">marketplace</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">customer_id</span> <span class=\"nb\">BIGINT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_id</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_id</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_parent</span> <span class=\"nb\">BIGINT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_title</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_category</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">star_rating</span> <span class=\"nb\">INTEGER</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">helpful_votes</span> <span class=\"nb\">INTEGER</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">total_votes</span> <span class=\"nb\">INTEGER</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">vine</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">verified_purchase</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_headline</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_body</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_date</span> <span class=\"nb\">DATE</span><span class=\"p\">)</span> \n",
       "<span class=\"n\">DISTRIBUTED</span> <span class=\"k\">BY</span> <span class=\"p\">(</span><span class=\"n\">review_id</span><span class=\"p\">);</span> \n",
       "</pre></div>\n",
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       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">DROP</span> <span class=\"k\">TABLE</span> <span class=\"k\">IF</span> <span class=\"k\">EXISTS</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_co</span><span class=\"p\">;</span> \n",
       "\n",
       "<span class=\"k\">CREATE</span> <span class=\"k\">TABLE</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_co</span><span class=\"p\">(</span> \n",
       "  <span class=\"n\">marketplace</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">customer_id</span> <span class=\"nb\">BIGINT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_id</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_id</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_parent</span> <span class=\"nb\">BIGINT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_title</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_category</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">star_rating</span> <span class=\"nb\">INTEGER</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">helpful_votes</span> <span class=\"nb\">INTEGER</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">total_votes</span> <span class=\"nb\">INTEGER</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">vine</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">verified_purchase</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_headline</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_body</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_date</span> <span class=\"nb\">DATE</span><span class=\"p\">)</span> \n",
       "<span class=\"k\">WITH</span> <span class=\"p\">(</span><span class=\"n\">appendonly</span><span class=\"o\">=</span><span class=\"k\">true</span><span class=\"p\">,</span> <span class=\"n\">orientation</span><span class=\"o\">=</span><span class=\"k\">column</span><span class=\"p\">,</span> <span class=\"n\">compresstype</span><span class=\"o\">=</span><span class=\"n\">zlib</span><span class=\"p\">,</span> <span class=\"n\">compresslevel</span><span class=\"o\">=</span><span class=\"mf\">3</span><span class=\"p\">)</span> \n",
       "<span class=\"n\">DISTRIBUTED</span> <span class=\"k\">BY</span> <span class=\"p\">(</span><span class=\"n\">review_id</span><span class=\"p\">);</span> \n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
      ]
     },
     "metadata": {},
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    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Done.\n",
      "Done.\n",
      "Done.\n",
      "Done.\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[]"
      ]
     },
     "execution_count": 4,
     "metadata": {},
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    }
   ],
   "source": [
    "sqlfilecode1 = !pygmentize -f html -O full,style=colorful -l postgres script/7-1-amzn-reviews-ro.sql\n",
    "sqlfilecode3 = !pygmentize -f html -O full,style=colorful -l postgres script/7-1-amzn-reviews-co.sql\n",
    "\n",
    "display_html('\\n'.join(sqlfilecode1), raw=True)\n",
    "display_html('\\n'.join(sqlfilecode3), raw=True)\n",
    "\n",
    "query1 = !cat script/7-1-amzn-reviews-ro.sql\n",
    "query3 = !cat script/7-1-amzn-reviews-co.sql\n",
    "\n",
    "%sql $DB_USER@$DB_SERVER {''.join(query1)}\n",
    "%sql $DB_USER@$DB_SERVER {''.join(query3)}"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 7.1 Loading\n",
    "\n",
    "#### 7.1.1 Loading from another source table\n",
    "\n",
    "Load the two tables using table `demo.amzn_reviews` as source (see [Notebook 1](AWS-GP-demo-1.ipynb)), and compare their loading times."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
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       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">EXPLAIN</span> <span class=\"k\">ANALYZE</span> \n",
       "<span class=\"k\">INSERT</span> <span class=\"k\">INTO</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_ro</span>\n",
       "<span class=\"k\">SELECT</span> <span class=\"o\">*</span> <span class=\"k\">FROM</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews</span><span class=\"p\">;</span>\n",
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       "body .vi { color: #3333BB } /* Name.Variable.Instance */\n",
       "body .vm { color: #996633 } /* Name.Variable.Magic */\n",
       "body .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */\n",
       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">EXPLAIN</span> <span class=\"k\">ANALYZE</span>\n",
       "<span class=\"k\">INSERT</span> <span class=\"k\">INTO</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_co</span>\n",
       "<span class=\"k\">SELECT</span> <span class=\"o\">*</span> <span class=\"k\">FROM</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews</span><span class=\"p\">;</span>\n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
      ]
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     "metadata": {},
     "output_type": "display_data"
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       "<head>\n",
       "  <title></title>\n",
       "  <meta http-equiv=\"content-type\" content=\"text/html; charset=UTF-8\">\n",
       "  <style type=\"text/css\">\n",
       "/*\n",
       "generated by Pygments <http://pygments.org>\n",
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       "Licensed under the BSD license, see LICENSE for details.\n",
       "*/\n",
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       "pre { line-height: 125%; }\n",
       "body .hll { background-color: #ffffcc }\n",
       "body  { background: #ffffff; }\n",
       "body .c { color: #888888 } /* Comment */\n",
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       "body .bp { color: #007020 } /* Name.Builtin.Pseudo */\n",
       "body .fm { color: #0066BB; font-weight: bold } /* Name.Function.Magic */\n",
       "body .vc { color: #336699 } /* Name.Variable.Class */\n",
       "body .vg { color: #dd7700; font-weight: bold } /* Name.Variable.Global */\n",
       "body .vi { color: #3333BB } /* Name.Variable.Instance */\n",
       "body .vm { color: #996633 } /* Name.Variable.Magic */\n",
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       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"n\">Execution</span> <span class=\"nb\">time</span><span class=\"p\">:</span> <span class=\"mf\">61925.636</span> <span class=\"n\">ms</span>\n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
      ]
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    }
   ],
   "source": [
    "sqlfilecode1 = !pygmentize -f html -O full,style=colorful -l postgres script/7-1-load-amzn-reviews-ro.sql\n",
    "display_html('\\n'.join(sqlfilecode1), raw=True)\n",
    "cmd1 = !echo $(cat script/7-1-load-amzn-reviews-ro.sql | \\\n",
    "               psql $CONNECTION_STRING | \\\n",
    "               grep -e 'Execution time') | \\\n",
    "    pygmentize -f html -O full,style=colorful -l postgres\n",
    "display_html('\\n'.join(cmd1), raw=True)\n",
    "\n",
    "sqlfilecode2 = !pygmentize -f html -O full,style=colorful -l postgres script/7-1-load-amzn-reviews-co.sql\n",
    "display_html('\\n'.join(sqlfilecode2), raw=True)\n",
    "cmd2 = !echo $(cat script/7-1-load-amzn-reviews-co.sql | \\\n",
    "               psql $CONNECTION_STRING | \\\n",
    "               grep -e 'Execution time') | \\\n",
    "    pygmentize -f html -O full,style=colorful -l postgres\n",
    "display_html('\\n'.join(cmd2), raw=True)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### 7.1.2 Loading from a source file (Bulk Loading)\n",
    "\n",
    "Let's drop & recreate the tables, load the input dataset in bulk to each using the `gpload` utility, and compare their loading times."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
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       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">DROP</span> <span class=\"k\">TABLE</span> <span class=\"k\">IF</span> <span class=\"k\">EXISTS</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_ro</span><span class=\"p\">;</span> \n",
       "\n",
       "<span class=\"k\">CREATE</span> <span class=\"k\">TABLE</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_ro</span><span class=\"p\">(</span> \n",
       "  <span class=\"n\">marketplace</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">customer_id</span> <span class=\"nb\">BIGINT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_id</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_id</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_parent</span> <span class=\"nb\">BIGINT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_title</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_category</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">star_rating</span> <span class=\"nb\">INTEGER</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">helpful_votes</span> <span class=\"nb\">INTEGER</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">total_votes</span> <span class=\"nb\">INTEGER</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">vine</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">verified_purchase</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_headline</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_body</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_date</span> <span class=\"nb\">DATE</span><span class=\"p\">)</span> \n",
       "<span class=\"n\">DISTRIBUTED</span> <span class=\"k\">BY</span> <span class=\"p\">(</span><span class=\"n\">review_id</span><span class=\"p\">);</span> \n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
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       "body .w { color: #bbbbbb } /* Text.Whitespace */\n",
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       "body .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */\n",
       "body .mo { color: #4400EE; font-weight: bold } /* Literal.Number.Oct */\n",
       "body .sa { background-color: #fff0f0 } /* Literal.String.Affix */\n",
       "body .sb { background-color: #fff0f0 } /* Literal.String.Backtick */\n",
       "body .sc { color: #0044DD } /* Literal.String.Char */\n",
       "body .dl { background-color: #fff0f0 } /* Literal.String.Delimiter */\n",
       "body .sd { color: #DD4422 } /* Literal.String.Doc */\n",
       "body .s2 { background-color: #fff0f0 } /* Literal.String.Double */\n",
       "body .se { color: #666666; font-weight: bold; background-color: #fff0f0 } /* Literal.String.Escape */\n",
       "body .sh { background-color: #fff0f0 } /* Literal.String.Heredoc */\n",
       "body .si { background-color: #eeeeee } /* Literal.String.Interpol */\n",
       "body .sx { color: #DD2200; background-color: #fff0f0 } /* Literal.String.Other */\n",
       "body .sr { color: #000000; background-color: #fff0ff } /* Literal.String.Regex */\n",
       "body .s1 { background-color: #fff0f0 } /* Literal.String.Single */\n",
       "body .ss { color: #AA6600 } /* Literal.String.Symbol */\n",
       "body .bp { color: #007020 } /* Name.Builtin.Pseudo */\n",
       "body .fm { color: #0066BB; font-weight: bold } /* Name.Function.Magic */\n",
       "body .vc { color: #336699 } /* Name.Variable.Class */\n",
       "body .vg { color: #dd7700; font-weight: bold } /* Name.Variable.Global */\n",
       "body .vi { color: #3333BB } /* Name.Variable.Instance */\n",
       "body .vm { color: #996633 } /* Name.Variable.Magic */\n",
       "body .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */\n",
       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">DROP</span> <span class=\"k\">TABLE</span> <span class=\"k\">IF</span> <span class=\"k\">EXISTS</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_co</span><span class=\"p\">;</span> \n",
       "\n",
       "<span class=\"k\">CREATE</span> <span class=\"k\">TABLE</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_co</span><span class=\"p\">(</span> \n",
       "  <span class=\"n\">marketplace</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">customer_id</span> <span class=\"nb\">BIGINT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_id</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_id</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_parent</span> <span class=\"nb\">BIGINT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_title</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">product_category</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">star_rating</span> <span class=\"nb\">INTEGER</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">helpful_votes</span> <span class=\"nb\">INTEGER</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">total_votes</span> <span class=\"nb\">INTEGER</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">vine</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">verified_purchase</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_headline</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_body</span> <span class=\"nb\">TEXT</span><span class=\"p\">,</span> \n",
       "  <span class=\"n\">review_date</span> <span class=\"nb\">DATE</span><span class=\"p\">)</span> \n",
       "<span class=\"k\">WITH</span> <span class=\"p\">(</span><span class=\"n\">appendonly</span><span class=\"o\">=</span><span class=\"k\">true</span><span class=\"p\">,</span> <span class=\"n\">orientation</span><span class=\"o\">=</span><span class=\"k\">column</span><span class=\"p\">,</span> <span class=\"n\">compresstype</span><span class=\"o\">=</span><span class=\"n\">zlib</span><span class=\"p\">,</span> <span class=\"n\">compresslevel</span><span class=\"o\">=</span><span class=\"mf\">3</span><span class=\"p\">)</span> \n",
       "<span class=\"n\">DISTRIBUTED</span> <span class=\"k\">BY</span> <span class=\"p\">(</span><span class=\"n\">review_id</span><span class=\"p\">);</span> \n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Done.\n",
      "Done.\n",
      "Done.\n",
      "Done.\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[]"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "sqlfilecode1 = !pygmentize -f html -O full,style=colorful -l postgres script/7-1-amzn-reviews-ro.sql\n",
    "sqlfilecode3 = !pygmentize -f html -O full,style=colorful -l postgres script/7-1-amzn-reviews-co.sql\n",
    "\n",
    "display_html('\\n'.join(sqlfilecode1), raw=True)\n",
    "display_html('\\n'.join(sqlfilecode3), raw=True)\n",
    "\n",
    "query1 = !cat script/7-1-amzn-reviews-ro.sql\n",
    "query3 = !cat script/7-1-amzn-reviews-co.sql\n",
    "\n",
    "%sql $DB_USER@$DB_SERVER {''.join(query1)}\n",
    "%sql $DB_USER@$DB_SERVER {''.join(query3)}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "7-1-gpload-amzn-reviews-ro.yaml               100%  377    44.1KB/s   00:00    \n",
      "2020-12-22 17:26:21|INFO|gpload session started 2020-12-22 17:26:21\n",
      "2020-12-22 17:26:21|INFO|no host supplied, defaulting to localhost\n",
      "2020-12-22 17:26:21|INFO|started gpfdist -p 8000 -P 9000 -f \"/data1/tmp_s3_data/amazon_reviews_us*.tsv.gz\" -t 30 -m 1000000\n",
      "2020-12-22 17:26:21|INFO|did not find an external table to reuse. creating ext_gpload_reusable_cf0d228c_447a_11eb_9163_064760077968\n",
      "2020-12-22 17:37:53|WARN|7622 bad rows\n",
      "2020-12-22 17:37:53|WARN|Please use following query to access the detailed error\n",
      "2020-12-22 17:37:53|WARN|select * from gp_read_error_log('ext_gpload_reusable_cf0d228c_447a_11eb_9163_064760077968') where cmdtime > to_timestamp('1608657981.54')\n",
      "2020-12-22 17:37:53|INFO|running time: 691.68 seconds\n",
      "2020-12-22 17:37:53|INFO|rows Inserted          = 150955707\n",
      "2020-12-22 17:37:53|INFO|rows Updated           = 0\n",
      "2020-12-22 17:37:53|INFO|data formatting errors = 7622\n",
      "2020-12-22 17:37:53|INFO|gpload succeeded with warnings\n"
     ]
    }
   ],
   "source": [
    "!ssh -i ~/.ssh/aws-gp.pem $DB_USER@$DB_SERVER 'if [ -f ./gpload-amzn-reviews-ro.log ]; then rm ./gpload-amzn-reviews-ro.log; fi'\n",
    "!scp -i ~/.ssh/aws-gp.pem script/7-1-gpload-amzn-reviews-ro.yaml $DB_USER@$DB_SERVER:gpload-amzn-reviews-ro.yaml\n",
    "cmd = \"gpload -d {0} -f ./gpload-amzn-reviews-ro.yaml -l ./gpload-amzn-reviews-ro.log 2>&1\".format(DB_NAME) \n",
    "!ssh -i ~/.ssh/aws-gp.pem $DB_USER@$DB_SERVER $cmd"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "7-1-gpload-amzn-reviews-co.yaml               100%  376    44.5KB/s   00:00    \n",
      "2020-12-22 17:37:54|INFO|gpload session started 2020-12-22 17:37:54\n",
      "2020-12-22 17:37:54|INFO|no host supplied, defaulting to localhost\n",
      "2020-12-22 17:37:54|INFO|started gpfdist -p 8000 -P 9000 -f \"/data1/tmp_s3_data/amazon_reviews_us*.tsv.gz\" -t 30 -m 1000000\n",
      "2020-12-22 17:37:54|INFO|did not find an external table to reuse. creating ext_gpload_reusable_6c3efade_447c_11eb_a46a_064760077968\n",
      "2020-12-22 17:48:48|WARN|7622 bad rows\n",
      "2020-12-22 17:48:48|WARN|Please use following query to access the detailed error\n",
      "2020-12-22 17:48:48|WARN|select * from gp_read_error_log('ext_gpload_reusable_6c3efade_447c_11eb_a46a_064760077968') where cmdtime > to_timestamp('1608658674.76')\n",
      "2020-12-22 17:48:48|INFO|running time: 653.57 seconds\n",
      "2020-12-22 17:48:48|INFO|rows Inserted          = 150955707\n",
      "2020-12-22 17:48:48|INFO|rows Updated           = 0\n",
      "2020-12-22 17:48:48|INFO|data formatting errors = 7622\n",
      "2020-12-22 17:48:48|INFO|gpload succeeded with warnings\n"
     ]
    }
   ],
   "source": [
    "!ssh -i ~/.ssh/aws-gp.pem $DB_USER@$DB_SERVER 'if [ -f ./gpload-amzn-reviews-co.log ]; then rm ./gpload-amzn-reviews-co.log; fi'\n",
    "!scp -i ~/.ssh/aws-gp.pem script/7-1-gpload-amzn-reviews-co.yaml $DB_USER@$DB_SERVER:gpload-amzn-reviews-co.yaml\n",
    "cmd = \"gpload -d {0} -f ./gpload-amzn-reviews-co.yaml -l ./gpload-amzn-reviews-co.log 2>&1\".format(DB_NAME) \n",
    "!ssh -i ~/.ssh/aws-gp.pem $DB_USER@$DB_SERVER $cmd"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01//EN\"\n",
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       "generated by Pygments <http://pygments.org>\n",
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       "<html>\n",
       "<head>\n",
       "  <title></title>\n",
       "  <meta http-equiv=\"content-type\" content=\"text/html; charset=UTF-8\">\n",
       "  <style type=\"text/css\">\n",
       "/*\n",
       "generated by Pygments <http://pygments.org>\n",
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       "Licensed under the BSD license, see LICENSE for details.\n",
       "*/\n",
       "td.linenos { background-color: #f0f0f0; padding-right: 10px; }\n",
       "span.lineno { background-color: #f0f0f0; padding: 0 5px 0 5px; }\n",
       "pre { line-height: 125%; }\n",
       "body .hll { background-color: #ffffcc }\n",
       "body  { background: #ffffff; }\n",
       "body .c { color: #888888 } /* Comment */\n",
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       "body .sa { background-color: #fff0f0 } /* Literal.String.Affix */\n",
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       "body .sc { color: #0044DD } /* Literal.String.Char */\n",
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       "body .sh { background-color: #fff0f0 } /* Literal.String.Heredoc */\n",
       "body .si { background-color: #eeeeee } /* Literal.String.Interpol */\n",
       "body .sx { color: #DD2200; background-color: #fff0f0 } /* Literal.String.Other */\n",
       "body .sr { color: #000000; background-color: #fff0ff } /* Literal.String.Regex */\n",
       "body .s1 { background-color: #fff0f0 } /* Literal.String.Single */\n",
       "body .ss { color: #AA6600 } /* Literal.String.Symbol */\n",
       "body .bp { color: #007020 } /* Name.Builtin.Pseudo */\n",
       "body .fm { color: #0066BB; font-weight: bold } /* Name.Function.Magic */\n",
       "body .vc { color: #336699 } /* Name.Variable.Class */\n",
       "body .vg { color: #dd7700; font-weight: bold } /* Name.Variable.Global */\n",
       "body .vi { color: #3333BB } /* Name.Variable.Instance */\n",
       "body .vm { color: #996633 } /* Name.Variable.Magic */\n",
       "body .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */\n",
       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"o\">/</span><span class=\"n\">home</span><span class=\"o\">/</span><span class=\"n\">gpadmin</span><span class=\"o\">/</span><span class=\"n\">gpload</span><span class=\"o\">-</span><span class=\"n\">amzn</span><span class=\"o\">-</span><span class=\"n\">reviews</span><span class=\"o\">-</span><span class=\"n\">co</span><span class=\"mf\">.</span><span class=\"n\">log</span> <span class=\"n\">finished</span> <span class=\"k\">in</span>  <span class=\"mf\">653.57</span> <span class=\"n\">seconds</span>\n",
       "<span class=\"o\">/</span><span class=\"n\">home</span><span class=\"o\">/</span><span class=\"n\">gpadmin</span><span class=\"o\">/</span><span class=\"n\">gpload</span><span class=\"o\">-</span><span class=\"n\">amzn</span><span class=\"o\">-</span><span class=\"n\">reviews</span><span class=\"o\">-</span><span class=\"n\">ro</span><span class=\"mf\">.</span><span class=\"n\">log</span> <span class=\"n\">finished</span> <span class=\"k\">in</span>  <span class=\"mf\">691.68</span> <span class=\"n\">seconds</span>\n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "cmd = 'grep -e '\"'\"'running'\"'\"' /home/gpadmin/gpload-amzn-reviews*\\\n",
    "    | awk '\"'\"'BEGIN{FS=\":\"} {print $1, \"finished in\", $5}'\"'\"'' \n",
    "grep_output = !ssh -i ~/.ssh/aws-gp.pem $DB_USER@$DB_SERVER $cmd | pygmentize -f html -O full,style=colorful -l postgres\n",
    "display_html('\\n'.join(grep_output), raw=True)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 7.2 Table Size and Disk Space Usage"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
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       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">SELECT</span> <span class=\"n\">pg_namespace</span><span class=\"mf\">.</span><span class=\"n\">nspname</span> <span class=\"k\">AS</span> <span class=\"k\">schema</span><span class=\"p\">,</span>\n",
       "\t<span class=\"n\">pg_class</span><span class=\"mf\">.</span><span class=\"n\">relname</span> <span class=\"k\">AS</span> <span class=\"n\">relation</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">pg_size_pretty</span><span class=\"p\">(</span><span class=\"n\">sotd</span><span class=\"mf\">.</span><span class=\"n\">sotdsize</span><span class=\"o\">::</span><span class=\"nb\">BIGINT</span><span class=\"p\">)</span> <span class=\"k\">as</span> <span class=\"n\">tablesize</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">pg_size_pretty</span><span class=\"p\">(</span><span class=\"n\">sotd</span><span class=\"mf\">.</span><span class=\"n\">sotdtoastsize</span><span class=\"o\">::</span><span class=\"nb\">BIGINT</span><span class=\"p\">)</span> <span class=\"k\">as</span> <span class=\"n\">toastsize</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">pg_size_pretty</span><span class=\"p\">(</span><span class=\"n\">sotd</span><span class=\"mf\">.</span><span class=\"n\">sotdadditionalsize</span><span class=\"o\">::</span><span class=\"nb\">BIGINT</span><span class=\"p\">)</span> <span class=\"k\">as</span> <span class=\"n\">othersize</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">pg_size_pretty</span><span class=\"p\">(</span><span class=\"n\">sotaid</span><span class=\"mf\">.</span><span class=\"n\">sotaidtablesize</span><span class=\"o\">::</span><span class=\"nb\">BIGINT</span><span class=\"p\">)</span> <span class=\"k\">as</span> <span class=\"n\">tabledisksize</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">pg_size_pretty</span><span class=\"p\">(</span><span class=\"n\">sotaid</span><span class=\"mf\">.</span><span class=\"n\">sotaididxsize</span><span class=\"o\">::</span><span class=\"nb\">BIGINT</span><span class=\"p\">)</span> <span class=\"k\">as</span> <span class=\"n\">indexsize</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">pg_size_pretty</span><span class=\"p\">(</span><span class=\"n\">sotu</span><span class=\"mf\">.</span><span class=\"n\">sotusize</span><span class=\"o\">::</span><span class=\"nb\">BIGINT</span><span class=\"p\">)</span> <span class=\"k\">as</span> <span class=\"n\">uncompressedsize</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">ROUND</span><span class=\"p\">((</span><span class=\"mf\">100.0</span> <span class=\"o\">*</span> <span class=\"p\">(</span><span class=\"mf\">1</span><span class=\"o\">-</span><span class=\"p\">(</span><span class=\"n\">sotaid</span><span class=\"mf\">.</span><span class=\"n\">sotaidtablesize</span><span class=\"o\">/</span><span class=\"n\">sotu</span><span class=\"mf\">.</span><span class=\"n\">sotusize</span><span class=\"p\">)))</span><span class=\"o\">::</span><span class=\"nb\">NUMERIC</span><span class=\"p\">,</span> <span class=\"mf\">2</span><span class=\"p\">)</span> <span class=\"k\">AS</span> <span class=\"n\">compressionpercentage</span> \n",
       "<span class=\"k\">FROM</span> <span class=\"n\">pg_class</span> \n",
       "\t<span class=\"k\">LEFT</span> <span class=\"k\">JOIN</span> <span class=\"n\">pg_stat_user_tables</span> \n",
       "\t\t<span class=\"k\">ON</span> <span class=\"n\">pg_stat_user_tables</span><span class=\"mf\">.</span><span class=\"n\">relid</span> <span class=\"o\">=</span> <span class=\"n\">pg_class</span><span class=\"mf\">.</span><span class=\"n\">oid</span> \n",
       "\t<span class=\"k\">LEFT</span> <span class=\"k\">JOIN</span> <span class=\"n\">gp_toolkit</span><span class=\"mf\">.</span><span class=\"n\">gp_size_of_table_disk</span> <span class=\"n\">sotd</span> \n",
       "\t\t<span class=\"k\">ON</span> <span class=\"n\">sotd</span><span class=\"mf\">.</span><span class=\"n\">sotdoid</span> <span class=\"o\">=</span> <span class=\"n\">pg_class</span><span class=\"mf\">.</span><span class=\"n\">oid</span> \n",
       "\t<span class=\"k\">LEFT</span> <span class=\"k\">JOIN</span> <span class=\"n\">gp_toolkit</span><span class=\"mf\">.</span><span class=\"n\">gp_size_of_table_and_indexes_disk</span> <span class=\"n\">sotaid</span> \n",
       "\t\t<span class=\"k\">ON</span> <span class=\"n\">sotaid</span><span class=\"mf\">.</span><span class=\"n\">sotaidoid</span> <span class=\"o\">=</span> <span class=\"n\">pg_class</span><span class=\"mf\">.</span><span class=\"n\">oid</span> \n",
       "\t<span class=\"k\">LEFT</span> <span class=\"k\">JOIN</span> <span class=\"n\">gp_toolkit</span><span class=\"mf\">.</span><span class=\"n\">gp_size_of_table_uncompressed</span> <span class=\"n\">sotu</span> \n",
       "\t\t<span class=\"k\">ON</span> <span class=\"n\">sotu</span><span class=\"mf\">.</span><span class=\"n\">sotuoid</span> <span class=\"o\">=</span> <span class=\"n\">pg_class</span><span class=\"mf\">.</span><span class=\"n\">oid</span> \n",
       "\t<span class=\"k\">LEFT</span> <span class=\"k\">JOIN</span> <span class=\"n\">pg_namespace</span> \n",
       "\t\t<span class=\"k\">ON</span> <span class=\"n\">pg_namespace</span><span class=\"mf\">.</span><span class=\"n\">oid</span> <span class=\"o\">=</span> <span class=\"n\">pg_class</span><span class=\"mf\">.</span><span class=\"n\">relnamespace</span> \n",
       "<span class=\"k\">WHERE</span> \n",
       "\t<span class=\"n\">pg_class</span><span class=\"mf\">.</span><span class=\"n\">relkind</span> <span class=\"o\">=</span> <span class=\"s1\">&#39;r&#39;</span>\n",
       "\t<span class=\"k\">AND</span> <span class=\"n\">relstorage</span> <span class=\"o\">!=</span> <span class=\"s1\">&#39;x&#39;</span> \t\t\t\t\t\t\n",
       "\t<span class=\"k\">AND</span> <span class=\"n\">pg_namespace</span><span class=\"mf\">.</span><span class=\"n\">nspname</span> <span class=\"k\">NOT</span> <span class=\"k\">IN</span> <span class=\"p\">(</span><span class=\"s1\">&#39;information_schema&#39;</span><span class=\"p\">,</span> <span class=\"s1\">&#39;madlib&#39;</span><span class=\"p\">,</span> <span class=\"s1\">&#39;pg_catalog&#39;</span><span class=\"p\">,</span> <span class=\"s1\">&#39;gptext&#39;</span><span class=\"p\">)</span> \n",
       "\t<span class=\"k\">AND</span> <span class=\"n\">pg_class</span><span class=\"mf\">.</span><span class=\"n\">relname</span> <span class=\"k\">NOT</span> <span class=\"k\">IN</span> <span class=\"p\">(</span><span class=\"s1\">&#39;spatial_ref_sys&#39;</span><span class=\"p\">)</span> \n",
       "<span class=\"k\">ORDER</span> <span class=\"k\">BY</span> <span class=\"mf\">1</span><span class=\"p\">,</span> <span class=\"mf\">2</span>\n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
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    },
    {
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     "output_type": "stream",
     "text": [
      "27 rows affected.\n"
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       "        <th>schema</th>\n",
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       "        <th>tablesize</th>\n",
       "        <th>toastsize</th>\n",
       "        <th>othersize</th>\n",
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       "        <td>demo</td>\n",
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       "        <td>demo</td>\n",
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       "        <td>1394 MB</td>\n",
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       "        <td>2051 MB</td>\n",
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       "    <tr>\n",
       "        <td>demo</td>\n",
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       "        <td>2539 MB</td>\n",
       "        <td>22 MB</td>\n",
       "        <td>0 bytes</td>\n",
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       "        <td>0 bytes</td>\n",
       "        <td>2561 MB</td>\n",
       "        <td>0.00</td>\n",
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       "    <tr>\n",
       "        <td>demo</td>\n",
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       "        <td>3289 MB</td>\n",
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       "    <tr>\n",
       "        <td>demo</td>\n",
       "        <td>amzn_reviews_partitioned_1_prt_year2011</td>\n",
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       "        <td>4882 MB</td>\n",
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       "        <td>demo</td>\n",
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       "    <tr>\n",
       "        <td>demo</td>\n",
       "        <td>amzn_reviews_partitioned_1_prt_year2013</td>\n",
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       "        <td>15 GB</td>\n",
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       "        <td>0.00</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "        <td>demo</td>\n",
       "        <td>amzn_reviews_partitioned_1_prt_year2014</td>\n",
       "        <td>19 GB</td>\n",
       "        <td>52 MB</td>\n",
       "        <td>0 bytes</td>\n",
       "        <td>19 GB</td>\n",
       "        <td>0 bytes</td>\n",
       "        <td>19 GB</td>\n",
       "        <td>0.00</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "        <td>demo</td>\n",
       "        <td>amzn_reviews_partitioned_1_prt_year2015</td>\n",
       "        <td>16 GB</td>\n",
       "        <td>34 MB</td>\n",
       "        <td>0 bytes</td>\n",
       "        <td>16 GB</td>\n",
       "        <td>0 bytes</td>\n",
       "        <td>16 GB</td>\n",
       "        <td>0.00</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "        <td>demo</td>\n",
       "        <td>amzn_reviews_ro</td>\n",
       "        <td>79 GB</td>\n",
       "        <td>231 MB</td>\n",
       "        <td>0 bytes</td>\n",
       "        <td>80 GB</td>\n",
       "        <td>0 bytes</td>\n",
       "        <td>80 GB</td>\n",
       "        <td>0.00</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "        <td>demo</td>\n",
       "        <td>calendar</td>\n",
       "        <td>1536 kB</td>\n",
       "        <td>0 bytes</td>\n",
       "        <td>0 bytes</td>\n",
       "        <td>1536 kB</td>\n",
       "        <td>0 bytes</td>\n",
       "        <td>1536 kB</td>\n",
       "        <td>0.00</td>\n",
       "    </tr>\n",
       "</table>"
      ],
      "text/plain": [
       "[('demo', 'amzn_reviews', '79 GB', '232 MB', '0 bytes', '80 GB', '0 bytes', '80 GB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_by_marketplace', '79 GB', '225 MB', '0 bytes', '80 GB', '0 bytes', '80 GB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_co', '32 GB', '1568 kB', '3136 kB', '32 GB', '0 bytes', '74 GB', Decimal('56.33')),\n",
       " ('demo', 'amzn_reviews_partitioned', '0 bytes', '1568 kB', '0 bytes', '1568 kB', '0 bytes', '1568 kB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year1995', '1504 kB', '1568 kB', '0 bytes', '3072 kB', '0 bytes', '3072 kB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year1996', '4800 kB', '1568 kB', '0 bytes', '6368 kB', '0 bytes', '6368 kB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year1997', '31 MB', '1568 kB', '0 bytes', '33 MB', '0 bytes', '33 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year1998', '119 MB', '1568 kB', '0 bytes', '121 MB', '0 bytes', '121 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year1999', '306 MB', '1568 kB', '0 bytes', '308 MB', '0 bytes', '308 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2000', '858 MB', '1888 kB', '0 bytes', '860 MB', '0 bytes', '860 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2001', '868 MB', '1696 kB', '0 bytes', '870 MB', '0 bytes', '870 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2002', '932 MB', '2336 kB', '0 bytes', '934 MB', '0 bytes', '934 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2003', '1065 MB', '2336 kB', '0 bytes', '1067 MB', '0 bytes', '1067 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2004', '1187 MB', '5248 kB', '0 bytes', '1192 MB', '0 bytes', '1192 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2005', '1390 MB', '13 MB', '0 bytes', '1403 MB', '0 bytes', '1403 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2006', '1394 MB', '14 MB', '0 bytes', '1409 MB', '0 bytes', '1409 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2007', '1765 MB', '14 MB', '0 bytes', '1779 MB', '0 bytes', '1779 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2008', '2032 MB', '19 MB', '0 bytes', '2051 MB', '0 bytes', '2051 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2009', '2539 MB', '22 MB', '0 bytes', '2561 MB', '0 bytes', '2561 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2010', '3262 MB', '27 MB', '0 bytes', '3289 MB', '0 bytes', '3289 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2011', '4849 MB', '32 MB', '0 bytes', '4882 MB', '0 bytes', '4882 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2012', '7727 MB', '38 MB', '0 bytes', '7765 MB', '0 bytes', '7765 MB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2013', '15 GB', '46 MB', '0 bytes', '15 GB', '0 bytes', '15 GB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2014', '19 GB', '52 MB', '0 bytes', '19 GB', '0 bytes', '19 GB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_partitioned_1_prt_year2015', '16 GB', '34 MB', '0 bytes', '16 GB', '0 bytes', '16 GB', Decimal('0.00')),\n",
       " ('demo', 'amzn_reviews_ro', '79 GB', '231 MB', '0 bytes', '80 GB', '0 bytes', '80 GB', Decimal('0.00')),\n",
       " ('demo', 'calendar', '1536 kB', '0 bytes', '0 bytes', '1536 kB', '0 bytes', '1536 kB', Decimal('0.00'))]"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "sqlfilecode = !pygmentize -f html -O full,style=colorful -l postgres script/7-2-table-size-comparison.sql\n",
    "display_html('\\n'.join(sqlfilecode), raw=True)\n",
    "query = !cat script/7-2-table-size-comparison.sql\n",
    "%sql $DB_USER@$DB_SERVER {''.join(query)}"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 7.3 Query Performance"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### 7.3.0 `ANALYZE` tables"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
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       "generated by Pygments <http://pygments.org>\n",
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       "Licensed under the BSD license, see LICENSE for details.\n",
       "-->\n",
       "<html>\n",
       "<head>\n",
       "  <title></title>\n",
       "  <meta http-equiv=\"content-type\" content=\"text/html; charset=UTF-8\">\n",
       "  <style type=\"text/css\">\n",
       "/*\n",
       "generated by Pygments <http://pygments.org>\n",
       "Copyright 2006-2019 by the Pygments team.\n",
       "Licensed under the BSD license, see LICENSE for details.\n",
       "*/\n",
       "td.linenos { background-color: #f0f0f0; padding-right: 10px; }\n",
       "span.lineno { background-color: #f0f0f0; padding: 0 5px 0 5px; }\n",
       "pre { line-height: 125%; }\n",
       "body .hll { background-color: #ffffcc }\n",
       "body  { background: #ffffff; }\n",
       "body .c { color: #888888 } /* Comment */\n",
       "body .err { color: #FF0000; background-color: #FFAAAA } /* Error */\n",
       "body .k { color: #008800; font-weight: bold } /* Keyword */\n",
       "body .o { color: #333333 } /* Operator */\n",
       "body .ch { color: #888888 } /* Comment.Hashbang */\n",
       "body .cm { color: #888888 } /* Comment.Multiline */\n",
       "body .cp { color: #557799 } /* Comment.Preproc */\n",
       "body .cpf { color: #888888 } /* Comment.PreprocFile */\n",
       "body .c1 { color: #888888 } /* Comment.Single */\n",
       "body .cs { color: #cc0000; font-weight: bold } /* Comment.Special */\n",
       "body .gd { color: #A00000 } /* Generic.Deleted */\n",
       "body .ge { font-style: italic } /* Generic.Emph */\n",
       "body .gr { color: #FF0000 } /* Generic.Error */\n",
       "body .gh { color: #000080; font-weight: bold } /* Generic.Heading */\n",
       "body .gi { color: #00A000 } /* Generic.Inserted */\n",
       "body .go { color: #888888 } /* Generic.Output */\n",
       "body .gp { color: #c65d09; font-weight: bold } /* Generic.Prompt */\n",
       "body .gs { font-weight: bold } /* Generic.Strong */\n",
       "body .gu { color: #800080; font-weight: bold } /* Generic.Subheading */\n",
       "body .gt { color: #0044DD } /* Generic.Traceback */\n",
       "body .kc { color: #008800; font-weight: bold } /* Keyword.Constant */\n",
       "body .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */\n",
       "body .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */\n",
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       "body .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */\n",
       "body .kt { color: #333399; font-weight: bold } /* Keyword.Type */\n",
       "body .m { color: #6600EE; font-weight: bold } /* Literal.Number */\n",
       "body .s { background-color: #fff0f0 } /* Literal.String */\n",
       "body .na { color: #0000CC } /* Name.Attribute */\n",
       "body .nb { color: #007020 } /* Name.Builtin */\n",
       "body .nc { color: #BB0066; font-weight: bold } /* Name.Class */\n",
       "body .no { color: #003366; font-weight: bold } /* Name.Constant */\n",
       "body .nd { color: #555555; font-weight: bold } /* Name.Decorator */\n",
       "body .ni { color: #880000; font-weight: bold } /* Name.Entity */\n",
       "body .ne { color: #FF0000; font-weight: bold } /* Name.Exception */\n",
       "body .nf { color: #0066BB; font-weight: bold } /* Name.Function */\n",
       "body .nl { color: #997700; font-weight: bold } /* Name.Label */\n",
       "body .nn { color: #0e84b5; font-weight: bold } /* Name.Namespace */\n",
       "body .nt { color: #007700 } /* Name.Tag */\n",
       "body .nv { color: #996633 } /* Name.Variable */\n",
       "body .ow { color: #000000; font-weight: bold } /* Operator.Word */\n",
       "body .w { color: #bbbbbb } /* Text.Whitespace */\n",
       "body .mb { color: #6600EE; font-weight: bold } /* Literal.Number.Bin */\n",
       "body .mf { color: #6600EE; font-weight: bold } /* Literal.Number.Float */\n",
       "body .mh { color: #005588; font-weight: bold } /* Literal.Number.Hex */\n",
       "body .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */\n",
       "body .mo { color: #4400EE; font-weight: bold } /* Literal.Number.Oct */\n",
       "body .sa { background-color: #fff0f0 } /* Literal.String.Affix */\n",
       "body .sb { background-color: #fff0f0 } /* Literal.String.Backtick */\n",
       "body .sc { color: #0044DD } /* Literal.String.Char */\n",
       "body .dl { background-color: #fff0f0 } /* Literal.String.Delimiter */\n",
       "body .sd { color: #DD4422 } /* Literal.String.Doc */\n",
       "body .s2 { background-color: #fff0f0 } /* Literal.String.Double */\n",
       "body .se { color: #666666; font-weight: bold; background-color: #fff0f0 } /* Literal.String.Escape */\n",
       "body .sh { background-color: #fff0f0 } /* Literal.String.Heredoc */\n",
       "body .si { background-color: #eeeeee } /* Literal.String.Interpol */\n",
       "body .sx { color: #DD2200; background-color: #fff0f0 } /* Literal.String.Other */\n",
       "body .sr { color: #000000; background-color: #fff0ff } /* Literal.String.Regex */\n",
       "body .s1 { background-color: #fff0f0 } /* Literal.String.Single */\n",
       "body .ss { color: #AA6600 } /* Literal.String.Symbol */\n",
       "body .bp { color: #007020 } /* Name.Builtin.Pseudo */\n",
       "body .fm { color: #0066BB; font-weight: bold } /* Name.Function.Magic */\n",
       "body .vc { color: #336699 } /* Name.Variable.Class */\n",
       "body .vg { color: #dd7700; font-weight: bold } /* Name.Variable.Global */\n",
       "body .vi { color: #3333BB } /* Name.Variable.Instance */\n",
       "body .vm { color: #996633 } /* Name.Variable.Magic */\n",
       "body .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */\n",
       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">ANALYZE</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_ro</span><span class=\"p\">;</span>\n",
       "<span class=\"k\">ANALYZE</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_co</span><span class=\"p\">;</span>\n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Done.\n",
      "Done.\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[]"
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "sqlfilecode = !pygmentize -f html -O full,style=colorful -l postgres script/7-3-analyze.sql\n",
    "display_html('\\n'.join(sqlfilecode), raw=True)\n",
    "query = !cat script/7-3-analyze.sql\n",
    "%sql $DB_USER@$DB_SERVER {''.join(query)}"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### 7.3.1 Narrow (*Few columns of the table*) `SELECT`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01//EN\"\n",
       "   \"http://www.w3.org/TR/html4/strict.dtd\">\n",
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       "generated by Pygments <http://pygments.org>\n",
       "Copyright 2006-2019 by the Pygments team.\n",
       "Licensed under the BSD license, see LICENSE for details.\n",
       "-->\n",
       "<html>\n",
       "<head>\n",
       "  <title></title>\n",
       "  <meta http-equiv=\"content-type\" content=\"text/html; charset=UTF-8\">\n",
       "  <style type=\"text/css\">\n",
       "/*\n",
       "generated by Pygments <http://pygments.org>\n",
       "Copyright 2006-2019 by the Pygments team.\n",
       "Licensed under the BSD license, see LICENSE for details.\n",
       "*/\n",
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       "body .hll { background-color: #ffffcc }\n",
       "body  { background: #ffffff; }\n",
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       "body .o { color: #333333 } /* Operator */\n",
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       "body .sh { background-color: #fff0f0 } /* Literal.String.Heredoc */\n",
       "body .si { background-color: #eeeeee } /* Literal.String.Interpol */\n",
       "body .sx { color: #DD2200; background-color: #fff0f0 } /* Literal.String.Other */\n",
       "body .sr { color: #000000; background-color: #fff0ff } /* Literal.String.Regex */\n",
       "body .s1 { background-color: #fff0f0 } /* Literal.String.Single */\n",
       "body .ss { color: #AA6600 } /* Literal.String.Symbol */\n",
       "body .bp { color: #007020 } /* Name.Builtin.Pseudo */\n",
       "body .fm { color: #0066BB; font-weight: bold } /* Name.Function.Magic */\n",
       "body .vc { color: #336699 } /* Name.Variable.Class */\n",
       "body .vg { color: #dd7700; font-weight: bold } /* Name.Variable.Global */\n",
       "body .vi { color: #3333BB } /* Name.Variable.Instance */\n",
       "body .vm { color: #996633 } /* Name.Variable.Magic */\n",
       "body .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */\n",
       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">EXPLAIN</span> <span class=\"k\">ANALYZE</span> \n",
       "<span class=\"k\">SELECT</span> <span class=\"n\">product_id</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">marketplace</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">product_category</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">star_rating</span> \n",
       "<span class=\"k\">FROM</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_ro</span> \n",
       "<span class=\"k\">WHERE</span> <span class=\"n\">DATE_PART</span><span class=\"p\">(</span><span class=\"s1\">&#39;year&#39;</span><span class=\"p\">,</span> <span class=\"n\">review_date</span><span class=\"p\">)</span> <span class=\"k\">BETWEEN</span> <span class=\"mf\">2000</span> <span class=\"k\">AND</span> <span class=\"mf\">2005</span><span class=\"p\">;</span>\n",
       "</pre></div>\n",
       "</body>\n",
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       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"n\">Execution</span> <span class=\"nb\">time</span><span class=\"p\">:</span> <span class=\"mf\">2678.600</span> <span class=\"n\">ms</span>\n",
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       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">EXPLAIN</span> <span class=\"k\">ANALYZE</span> \n",
       "<span class=\"k\">SELECT</span> <span class=\"n\">product_id</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">marketplace</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">product_category</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">star_rating</span> \n",
       "<span class=\"k\">FROM</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_co</span>\n",
       "<span class=\"k\">WHERE</span> <span class=\"n\">DATE_PART</span><span class=\"p\">(</span><span class=\"s1\">&#39;year&#39;</span><span class=\"p\">,</span> <span class=\"n\">review_date</span><span class=\"p\">)</span> <span class=\"k\">BETWEEN</span> <span class=\"mf\">2000</span> <span class=\"k\">AND</span> <span class=\"mf\">2005</span><span class=\"p\">;</span>\n",
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       "\n",
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       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"n\">Execution</span> <span class=\"nb\">time</span><span class=\"p\">:</span> <span class=\"mf\">2363.019</span> <span class=\"n\">ms</span>\n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
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   "source": [
    "sqlfilecode1 = !pygmentize -f html -O full,style=colorful -l postgres script/7-3-narrow-select-ro.sql\n",
    "display_html('\\n'.join(sqlfilecode1), raw=True)\n",
    "cmd1 = !echo $(cat script/7-3-narrow-select-ro.sql | \\\n",
    "               psql $CONNECTION_STRING | \\\n",
    "               grep -e 'Execution time') | \\\n",
    "    pygmentize -f html -O full,style=colorful -l postgres\n",
    "display_html('\\n'.join(cmd1), raw=True)\n",
    "\n",
    "sqlfilecode3 = !pygmentize -f html -O full,style=colorful -l postgres script/7-3-narrow-select-co.sql\n",
    "display_html('\\n'.join(sqlfilecode3), raw=True)\n",
    "cmd3 = !echo $(cat script/7-3-narrow-select-co.sql | \\\n",
    "               psql $CONNECTION_STRING | \\\n",
    "               grep -e 'Execution time') | \\\n",
    "    pygmentize -f html -O full,style=colorful -l postgres\n",
    "display_html('\\n'.join(cmd3), raw=True)"
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  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### 7.3.2.1 Super Narrow (*1 column of the table*) `SELECT`: \"Short\" Data Field example"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
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       "<span class=\"k\">SELECT</span> <span class=\"n\">product_id</span> \n",
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       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"n\">Execution</span> <span class=\"nb\">time</span><span class=\"p\">:</span> <span class=\"mf\">2641.428</span> <span class=\"n\">ms</span>\n",
       "</pre></div>\n",
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       "<span class=\"k\">SELECT</span> <span class=\"n\">product_id</span> \n",
       "<span class=\"k\">FROM</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_co</span> \n",
       "<span class=\"k\">WHERE</span> <span class=\"n\">DATE_PART</span><span class=\"p\">(</span><span class=\"s1\">&#39;year&#39;</span><span class=\"p\">,</span> <span class=\"n\">review_date</span><span class=\"p\">)</span> <span class=\"k\">BETWEEN</span> <span class=\"mf\">2000</span> <span class=\"k\">AND</span> <span class=\"mf\">2005</span><span class=\"p\">;</span> \n",
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       "\n",
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       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"n\">Execution</span> <span class=\"nb\">time</span><span class=\"p\">:</span> <span class=\"mf\">2355.114</span> <span class=\"n\">ms</span>\n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
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   "source": [
    "sqlfilecode1 = !pygmentize -f html -O full,style=colorful -l postgres script/7-3-super-narrow-select-ro.sql\n",
    "display_html('\\n'.join(sqlfilecode1), raw=True)\n",
    "cmd1 = !echo $(cat script/7-3-super-narrow-select-ro.sql | \\\n",
    "               psql $CONNECTION_STRING | \\\n",
    "               grep -e 'Execution time') | \\\n",
    "    pygmentize -f html -O full,style=colorful -l postgres\n",
    "display_html('\\n'.join(cmd1), raw=True)\n",
    "\n",
    "sqlfilecode3 = !pygmentize -f html -O full,style=colorful -l postgres script/7-3-super-narrow-select-co.sql\n",
    "display_html('\\n'.join(sqlfilecode3), raw=True)\n",
    "cmd3 = !echo $(cat script/7-3-super-narrow-select-co.sql | \\\n",
    "               psql $CONNECTION_STRING | \\\n",
    "               grep -e 'Execution time') | \\\n",
    "    pygmentize -f html -O full,style=colorful -l postgres\n",
    "display_html('\\n'.join(cmd3), raw=True)"
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  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### 7.3.2.2 Super Narrow (*1 column of the table*) `SELECT`:  \"Long\" Data Field example"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
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       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">EXPLAIN</span> <span class=\"k\">ANALYZE</span> \n",
       "<span class=\"k\">SELECT</span> <span class=\"n\">review_body</span> \n",
       "<span class=\"k\">FROM</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_ro</span> \n",
       "<span class=\"k\">WHERE</span> <span class=\"n\">DATE_PART</span><span class=\"p\">(</span><span class=\"s1\">&#39;year&#39;</span><span class=\"p\">,</span> <span class=\"n\">review_date</span><span class=\"p\">)</span> <span class=\"k\">BETWEEN</span> <span class=\"mf\">2000</span> <span class=\"k\">AND</span> <span class=\"mf\">2005</span><span class=\"p\">;</span> \n",
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       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"n\">Execution</span> <span class=\"nb\">time</span><span class=\"p\">:</span> <span class=\"mf\">8009.751</span> <span class=\"n\">ms</span>\n",
       "</pre></div>\n",
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       "body .kc { color: #008800; font-weight: bold } /* Keyword.Constant */\n",
       "body .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */\n",
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       "body .m { color: #6600EE; font-weight: bold } /* Literal.Number */\n",
       "body .s { background-color: #fff0f0 } /* Literal.String */\n",
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       "body .nd { color: #555555; font-weight: bold } /* Name.Decorator */\n",
       "body .ni { color: #880000; font-weight: bold } /* Name.Entity */\n",
       "body .ne { color: #FF0000; font-weight: bold } /* Name.Exception */\n",
       "body .nf { color: #0066BB; font-weight: bold } /* Name.Function */\n",
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       "body .nn { color: #0e84b5; font-weight: bold } /* Name.Namespace */\n",
       "body .nt { color: #007700 } /* Name.Tag */\n",
       "body .nv { color: #996633 } /* Name.Variable */\n",
       "body .ow { color: #000000; font-weight: bold } /* Operator.Word */\n",
       "body .w { color: #bbbbbb } /* Text.Whitespace */\n",
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       "body .sa { background-color: #fff0f0 } /* Literal.String.Affix */\n",
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       "body .sd { color: #DD4422 } /* Literal.String.Doc */\n",
       "body .s2 { background-color: #fff0f0 } /* Literal.String.Double */\n",
       "body .se { color: #666666; font-weight: bold; background-color: #fff0f0 } /* Literal.String.Escape */\n",
       "body .sh { background-color: #fff0f0 } /* Literal.String.Heredoc */\n",
       "body .si { background-color: #eeeeee } /* Literal.String.Interpol */\n",
       "body .sx { color: #DD2200; background-color: #fff0f0 } /* Literal.String.Other */\n",
       "body .sr { color: #000000; background-color: #fff0ff } /* Literal.String.Regex */\n",
       "body .s1 { background-color: #fff0f0 } /* Literal.String.Single */\n",
       "body .ss { color: #AA6600 } /* Literal.String.Symbol */\n",
       "body .bp { color: #007020 } /* Name.Builtin.Pseudo */\n",
       "body .fm { color: #0066BB; font-weight: bold } /* Name.Function.Magic */\n",
       "body .vc { color: #336699 } /* Name.Variable.Class */\n",
       "body .vg { color: #dd7700; font-weight: bold } /* Name.Variable.Global */\n",
       "body .vi { color: #3333BB } /* Name.Variable.Instance */\n",
       "body .vm { color: #996633 } /* Name.Variable.Magic */\n",
       "body .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */\n",
       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">EXPLAIN</span> <span class=\"k\">ANALYZE</span> \n",
       "<span class=\"k\">SELECT</span> <span class=\"n\">review_body</span> \n",
       "<span class=\"k\">FROM</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_co</span> \n",
       "<span class=\"k\">WHERE</span> <span class=\"n\">DATE_PART</span><span class=\"p\">(</span><span class=\"s1\">&#39;year&#39;</span><span class=\"p\">,</span> <span class=\"n\">review_date</span><span class=\"p\">)</span> <span class=\"k\">BETWEEN</span> <span class=\"mf\">2000</span> <span class=\"k\">AND</span> <span class=\"mf\">2005</span><span class=\"p\">;</span> \n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
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     "data": {
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       "<head>\n",
       "  <title></title>\n",
       "  <meta http-equiv=\"content-type\" content=\"text/html; charset=UTF-8\">\n",
       "  <style type=\"text/css\">\n",
       "/*\n",
       "generated by Pygments <http://pygments.org>\n",
       "Copyright 2006-2019 by the Pygments team.\n",
       "Licensed under the BSD license, see LICENSE for details.\n",
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       "body .ch { color: #888888 } /* Comment.Hashbang */\n",
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       "body .bp { color: #007020 } /* Name.Builtin.Pseudo */\n",
       "body .fm { color: #0066BB; font-weight: bold } /* Name.Function.Magic */\n",
       "body .vc { color: #336699 } /* Name.Variable.Class */\n",
       "body .vg { color: #dd7700; font-weight: bold } /* Name.Variable.Global */\n",
       "body .vi { color: #3333BB } /* Name.Variable.Instance */\n",
       "body .vm { color: #996633 } /* Name.Variable.Magic */\n",
       "body .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */\n",
       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"n\">Execution</span> <span class=\"nb\">time</span><span class=\"p\">:</span> <span class=\"mf\">13329.268</span> <span class=\"n\">ms</span>\n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
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   ],
   "source": [
    "sqlfilecode1 = !pygmentize -f html -O full,style=colorful -l postgres script/7-3-super-narrow-select-ro-2.sql\n",
    "display_html('\\n'.join(sqlfilecode1), raw=True)\n",
    "cmd1 = !echo $(cat script/7-3-super-narrow-select-ro-2.sql | \\\n",
    "               psql $CONNECTION_STRING | \\\n",
    "               grep -e 'Execution time') | \\\n",
    "    pygmentize -f html -O full,style=colorful -l postgres\n",
    "display_html('\\n'.join(cmd1), raw=True)\n",
    "\n",
    "sqlfilecode3 = !pygmentize -f html -O full,style=colorful -l postgres script/7-3-super-narrow-select-co-2.sql\n",
    "display_html('\\n'.join(sqlfilecode3), raw=True)\n",
    "cmd3 = !echo $(cat script/7-3-super-narrow-select-co-2.sql | \\\n",
    "               psql $CONNECTION_STRING | \\\n",
    "               grep -e 'Execution time') | \\\n",
    "    pygmentize -f html -O full,style=colorful -l postgres\n",
    "display_html('\\n'.join(cmd3), raw=True)"
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  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### 7.3.3 Wide (*Most/Many columns of the table*) `SELECT`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [
    {
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       "body .vc { color: #336699 } /* Name.Variable.Class */\n",
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       "body .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */\n",
       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">EXPLAIN</span> <span class=\"k\">ANALYZE</span> \n",
       "<span class=\"k\">SELECT</span> <span class=\"n\">marketplace</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">customer_id</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">product_id</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">product_title</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">product_parent</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">product_category</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">star_rating</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">helpful_votes</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">total_votes</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">vine</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">verified_purchase</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">review_headline</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">review_body</span> \n",
       "<span class=\"k\">FROM</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_ro</span> \n",
       "<span class=\"k\">WHERE</span> <span class=\"n\">DATE_PART</span><span class=\"p\">(</span><span class=\"s1\">&#39;year&#39;</span><span class=\"p\">,</span> <span class=\"n\">review_date</span><span class=\"p\">)</span> <span class=\"k\">BETWEEN</span> <span class=\"mf\">2000</span> <span class=\"k\">AND</span> <span class=\"mf\">2005</span><span class=\"p\">;</span>\n",
       "</pre></div>\n",
       "</body>\n",
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       "\n",
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       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"n\">Execution</span> <span class=\"nb\">time</span><span class=\"p\">:</span> <span class=\"mf\">8993.215</span> <span class=\"n\">ms</span>\n",
       "</pre></div>\n",
       "</body>\n",
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       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">EXPLAIN</span> <span class=\"k\">ANALYZE</span> \n",
       "<span class=\"k\">SELECT</span> <span class=\"n\">marketplace</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">customer_id</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">product_id</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">product_title</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">product_parent</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">product_category</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">star_rating</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">helpful_votes</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">total_votes</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">vine</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">verified_purchase</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">review_headline</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">review_body</span> \n",
       "<span class=\"k\">FROM</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_co</span> \n",
       "<span class=\"k\">WHERE</span> <span class=\"n\">DATE_PART</span><span class=\"p\">(</span><span class=\"s1\">&#39;year&#39;</span><span class=\"p\">,</span> <span class=\"n\">review_date</span><span class=\"p\">)</span> <span class=\"k\">BETWEEN</span> <span class=\"mf\">2000</span> <span class=\"k\">AND</span> <span class=\"mf\">2005</span><span class=\"p\">;</span>\n",
       "</pre></div>\n",
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       "\n",
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       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"n\">Execution</span> <span class=\"nb\">time</span><span class=\"p\">:</span> <span class=\"mf\">15890.503</span> <span class=\"n\">ms</span>\n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
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   "source": [
    "sqlfilecode1 = !pygmentize -f html -O full,style=colorful -l postgres script/7-3-wide-select-ro.sql\n",
    "display_html('\\n'.join(sqlfilecode1), raw=True)\n",
    "cmd1 = !echo $(cat script/7-3-wide-select-ro.sql | \\\n",
    "               psql $CONNECTION_STRING | \\\n",
    "               grep -e 'Execution time') | \\\n",
    "    pygmentize -f html -O full,style=colorful -l postgres\n",
    "display_html('\\n'.join(cmd1), raw=True)\n",
    "\n",
    "sqlfilecode3 = !pygmentize -f html -O full,style=colorful -l postgres script/7-3-wide-select-co.sql\n",
    "display_html('\\n'.join(sqlfilecode3), raw=True)\n",
    "cmd3 = !echo $(cat script/7-3-wide-select-co.sql | \\\n",
    "               psql $CONNECTION_STRING | \\\n",
    "               grep -e 'Execution time') | \\\n",
    "    pygmentize -f html -O full,style=colorful -l postgres\n",
    "display_html('\\n'.join(cmd3), raw=True)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### 7.3.4.1 Aggregate/Window Functions over a limited number of columns"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
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       "\n",
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       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">EXPLAIN</span> <span class=\"k\">ANALYZE</span> \n",
       "<span class=\"k\">SELECT</span> <span class=\"n\">COUNT</span><span class=\"p\">(</span><span class=\"o\">*</span><span class=\"p\">),</span> \n",
       "\t<span class=\"n\">product_category</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">star_rating</span> \n",
       "<span class=\"k\">FROM</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_ro</span> \n",
       "<span class=\"k\">GROUP</span> <span class=\"k\">BY</span> <span class=\"mf\">2</span><span class=\"p\">,</span> <span class=\"mf\">3</span><span class=\"p\">;</span>\n",
       "</pre></div>\n",
       "</body>\n",
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       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"n\">Execution</span> <span class=\"nb\">time</span><span class=\"p\">:</span> <span class=\"mf\">2521.676</span> <span class=\"n\">ms</span>\n",
       "</pre></div>\n",
       "</body>\n",
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       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">EXPLAIN</span> <span class=\"k\">ANALYZE</span> \n",
       "<span class=\"k\">SELECT</span> <span class=\"n\">COUNT</span><span class=\"p\">(</span><span class=\"o\">*</span><span class=\"p\">),</span> \n",
       "\t<span class=\"n\">product_category</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">star_rating</span> \n",
       "<span class=\"k\">FROM</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_co</span> \n",
       "<span class=\"k\">GROUP</span> <span class=\"k\">BY</span> <span class=\"mf\">2</span><span class=\"p\">,</span> <span class=\"mf\">3</span><span class=\"p\">;</span>\n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
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       "  <title></title>\n",
       "  <meta http-equiv=\"content-type\" content=\"text/html; charset=UTF-8\">\n",
       "  <style type=\"text/css\">\n",
       "/*\n",
       "generated by Pygments <http://pygments.org>\n",
       "Copyright 2006-2019 by the Pygments team.\n",
       "Licensed under the BSD license, see LICENSE for details.\n",
       "*/\n",
       "td.linenos { background-color: #f0f0f0; padding-right: 10px; }\n",
       "span.lineno { background-color: #f0f0f0; padding: 0 5px 0 5px; }\n",
       "pre { line-height: 125%; }\n",
       "body .hll { background-color: #ffffcc }\n",
       "body  { background: #ffffff; }\n",
       "body .c { color: #888888 } /* Comment */\n",
       "body .err { color: #FF0000; background-color: #FFAAAA } /* Error */\n",
       "body .k { color: #008800; font-weight: bold } /* Keyword */\n",
       "body .o { color: #333333 } /* Operator */\n",
       "body .ch { color: #888888 } /* Comment.Hashbang */\n",
       "body .cm { color: #888888 } /* Comment.Multiline */\n",
       "body .cp { color: #557799 } /* Comment.Preproc */\n",
       "body .cpf { color: #888888 } /* Comment.PreprocFile */\n",
       "body .c1 { color: #888888 } /* Comment.Single */\n",
       "body .cs { color: #cc0000; font-weight: bold } /* Comment.Special */\n",
       "body .gd { color: #A00000 } /* Generic.Deleted */\n",
       "body .ge { font-style: italic } /* Generic.Emph */\n",
       "body .gr { color: #FF0000 } /* Generic.Error */\n",
       "body .gh { color: #000080; font-weight: bold } /* Generic.Heading */\n",
       "body .gi { color: #00A000 } /* Generic.Inserted */\n",
       "body .go { color: #888888 } /* Generic.Output */\n",
       "body .gp { color: #c65d09; font-weight: bold } /* Generic.Prompt */\n",
       "body .gs { font-weight: bold } /* Generic.Strong */\n",
       "body .gu { color: #800080; font-weight: bold } /* Generic.Subheading */\n",
       "body .gt { color: #0044DD } /* Generic.Traceback */\n",
       "body .kc { color: #008800; font-weight: bold } /* Keyword.Constant */\n",
       "body .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */\n",
       "body .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */\n",
       "body .kp { color: #003388; font-weight: bold } /* Keyword.Pseudo */\n",
       "body .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */\n",
       "body .kt { color: #333399; font-weight: bold } /* Keyword.Type */\n",
       "body .m { color: #6600EE; font-weight: bold } /* Literal.Number */\n",
       "body .s { background-color: #fff0f0 } /* Literal.String */\n",
       "body .na { color: #0000CC } /* Name.Attribute */\n",
       "body .nb { color: #007020 } /* Name.Builtin */\n",
       "body .nc { color: #BB0066; font-weight: bold } /* Name.Class */\n",
       "body .no { color: #003366; font-weight: bold } /* Name.Constant */\n",
       "body .nd { color: #555555; font-weight: bold } /* Name.Decorator */\n",
       "body .ni { color: #880000; font-weight: bold } /* Name.Entity */\n",
       "body .ne { color: #FF0000; font-weight: bold } /* Name.Exception */\n",
       "body .nf { color: #0066BB; font-weight: bold } /* Name.Function */\n",
       "body .nl { color: #997700; font-weight: bold } /* Name.Label */\n",
       "body .nn { color: #0e84b5; font-weight: bold } /* Name.Namespace */\n",
       "body .nt { color: #007700 } /* Name.Tag */\n",
       "body .nv { color: #996633 } /* Name.Variable */\n",
       "body .ow { color: #000000; font-weight: bold } /* Operator.Word */\n",
       "body .w { color: #bbbbbb } /* Text.Whitespace */\n",
       "body .mb { color: #6600EE; font-weight: bold } /* Literal.Number.Bin */\n",
       "body .mf { color: #6600EE; font-weight: bold } /* Literal.Number.Float */\n",
       "body .mh { color: #005588; font-weight: bold } /* Literal.Number.Hex */\n",
       "body .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */\n",
       "body .mo { color: #4400EE; font-weight: bold } /* Literal.Number.Oct */\n",
       "body .sa { background-color: #fff0f0 } /* Literal.String.Affix */\n",
       "body .sb { background-color: #fff0f0 } /* Literal.String.Backtick */\n",
       "body .sc { color: #0044DD } /* Literal.String.Char */\n",
       "body .dl { background-color: #fff0f0 } /* Literal.String.Delimiter */\n",
       "body .sd { color: #DD4422 } /* Literal.String.Doc */\n",
       "body .s2 { background-color: #fff0f0 } /* Literal.String.Double */\n",
       "body .se { color: #666666; font-weight: bold; background-color: #fff0f0 } /* Literal.String.Escape */\n",
       "body .sh { background-color: #fff0f0 } /* Literal.String.Heredoc */\n",
       "body .si { background-color: #eeeeee } /* Literal.String.Interpol */\n",
       "body .sx { color: #DD2200; background-color: #fff0f0 } /* Literal.String.Other */\n",
       "body .sr { color: #000000; background-color: #fff0ff } /* Literal.String.Regex */\n",
       "body .s1 { background-color: #fff0f0 } /* Literal.String.Single */\n",
       "body .ss { color: #AA6600 } /* Literal.String.Symbol */\n",
       "body .bp { color: #007020 } /* Name.Builtin.Pseudo */\n",
       "body .fm { color: #0066BB; font-weight: bold } /* Name.Function.Magic */\n",
       "body .vc { color: #336699 } /* Name.Variable.Class */\n",
       "body .vg { color: #dd7700; font-weight: bold } /* Name.Variable.Global */\n",
       "body .vi { color: #3333BB } /* Name.Variable.Instance */\n",
       "body .vm { color: #996633 } /* Name.Variable.Magic */\n",
       "body .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */\n",
       "\n",
       "  </style>\n",
       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"n\">Execution</span> <span class=\"nb\">time</span><span class=\"p\">:</span> <span class=\"mf\">904.490</span> <span class=\"n\">ms</span>\n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "sqlfilecode1 = !pygmentize -f html -O full,style=colorful -l postgres script/7-3-aggr-select-ro.sql\n",
    "display_html('\\n'.join(sqlfilecode1), raw=True)\n",
    "cmd1 = !echo $(cat script/7-3-aggr-select-ro.sql | \\\n",
    "               psql $CONNECTION_STRING | \\\n",
    "               grep -e 'Execution time') | \\\n",
    "    pygmentize -f html -O full,style=colorful -l postgres\n",
    "display_html('\\n'.join(cmd1), raw=True)\n",
    "\n",
    "sqlfilecode3 = !pygmentize -f html -O full,style=colorful -l postgres script/7-3-aggr-select-co.sql\n",
    "display_html('\\n'.join(sqlfilecode3), raw=True)\n",
    "cmd3 = !echo $(cat script/7-3-aggr-select-co.sql | \\\n",
    "               psql $CONNECTION_STRING | \\\n",
    "               grep -e 'Execution time') | \\\n",
    "    pygmentize -f html -O full,style=colorful -l postgres\n",
    "display_html('\\n'.join(cmd3), raw=True)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### 7.3.4.2 Aggregate/Window Functions over a more columns"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {},
   "outputs": [
    {
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       "\n",
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       "</head>\n",
       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"k\">EXPLAIN</span> <span class=\"k\">ANALYZE</span> \n",
       "<span class=\"k\">SELECT</span> <span class=\"n\">COUNT</span><span class=\"p\">(</span><span class=\"o\">*</span><span class=\"p\">),</span> \n",
       "\t<span class=\"n\">ROUND</span><span class=\"p\">(</span><span class=\"n\">AVG</span><span class=\"p\">(</span><span class=\"n\">helpful_votes</span><span class=\"p\">))</span> <span class=\"k\">AS</span> <span class=\"n\">helpful_votes_avg</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">ROUND</span><span class=\"p\">(</span><span class=\"n\">AVG</span><span class=\"p\">(</span><span class=\"n\">total_votes</span><span class=\"p\">))</span> <span class=\"k\">AS</span> <span class=\"n\">total_votes_Avg</span><span class=\"p\">,</span>\n",
       "\t<span class=\"n\">marketplace</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">product_category</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">star_rating</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">verified_purchase</span><span class=\"p\">,</span> \n",
       "\t<span class=\"k\">CASE</span> <span class=\"k\">WHEN</span> <span class=\"n\">LENGTH</span><span class=\"p\">(</span><span class=\"n\">review_headline</span><span class=\"p\">)</span><span class=\"o\">&lt;=</span> <span class=\"mf\">20</span> <span class=\"k\">THEN</span> <span class=\"s1\">&#39;Short Headline&#39;</span> <span class=\"k\">ELSE</span> <span class=\"s1\">&#39;Long Headline&#39;</span> <span class=\"k\">END</span> <span class=\"k\">AS</span> <span class=\"n\">review_headline_length_type</span><span class=\"p\">,</span>\n",
       "\t<span class=\"k\">CASE</span> <span class=\"k\">WHEN</span> <span class=\"n\">LENGTH</span><span class=\"p\">(</span><span class=\"n\">review_body</span><span class=\"p\">)</span><span class=\"o\">&lt;=</span> <span class=\"mf\">400</span> <span class=\"k\">THEN</span> <span class=\"s1\">&#39;Short Body&#39;</span> <span class=\"k\">ELSE</span> <span class=\"s1\">&#39;Long Body&#39;</span> <span class=\"k\">END</span> <span class=\"k\">AS</span> <span class=\"n\">review_body_length_type</span>\n",
       "<span class=\"k\">FROM</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_ro</span> \n",
       "<span class=\"k\">GROUP</span> <span class=\"k\">BY</span> <span class=\"mf\">4</span><span class=\"p\">,</span> <span class=\"mf\">5</span><span class=\"p\">,</span> <span class=\"mf\">6</span><span class=\"p\">,</span> <span class=\"mf\">7</span><span class=\"p\">,</span> <span class=\"mf\">8</span><span class=\"p\">,</span> <span class=\"mf\">9</span><span class=\"p\">;</span> \n",
       "</pre></div>\n",
       "</body>\n",
       "</html>"
      ]
     },
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       "<body>\n",
       "<h2></h2>\n",
       "\n",
       "<div class=\"highlight\"><pre><span></span><span class=\"n\">Execution</span> <span class=\"nb\">time</span><span class=\"p\">:</span> <span class=\"mf\">1395.493</span> <span class=\"n\">ms</span>\n",
       "</pre></div>\n",
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       "<span class=\"k\">SELECT</span> <span class=\"n\">COUNT</span><span class=\"p\">(</span><span class=\"o\">*</span><span class=\"p\">),</span> \n",
       "\t<span class=\"n\">ROUND</span><span class=\"p\">(</span><span class=\"n\">AVG</span><span class=\"p\">(</span><span class=\"n\">helpful_votes</span><span class=\"p\">))</span> <span class=\"k\">AS</span> <span class=\"n\">helpful_votes_avg</span><span class=\"p\">,</span> \n",
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       "\t<span class=\"n\">marketplace</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">product_category</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">star_rating</span><span class=\"p\">,</span> \n",
       "\t<span class=\"n\">verified_purchase</span><span class=\"p\">,</span> \n",
       "\t<span class=\"k\">CASE</span> <span class=\"k\">WHEN</span> <span class=\"n\">LENGTH</span><span class=\"p\">(</span><span class=\"n\">review_headline</span><span class=\"p\">)</span><span class=\"o\">&lt;=</span> <span class=\"mf\">20</span> <span class=\"k\">THEN</span> <span class=\"s1\">&#39;Short Headline&#39;</span> <span class=\"k\">ELSE</span> <span class=\"s1\">&#39;Long Headline&#39;</span> <span class=\"k\">END</span> <span class=\"k\">AS</span> <span class=\"n\">review_headline_length_type</span><span class=\"p\">,</span>\n",
       "\t<span class=\"k\">CASE</span> <span class=\"k\">WHEN</span> <span class=\"n\">LENGTH</span><span class=\"p\">(</span><span class=\"n\">review_body</span><span class=\"p\">)</span><span class=\"o\">&lt;=</span> <span class=\"mf\">400</span> <span class=\"k\">THEN</span> <span class=\"s1\">&#39;Short Body&#39;</span> <span class=\"k\">ELSE</span> <span class=\"s1\">&#39;Long Body&#39;</span> <span class=\"k\">END</span> <span class=\"k\">AS</span> <span class=\"n\">review_body_length_type</span>\n",
       "<span class=\"k\">FROM</span> <span class=\"n\">demo</span><span class=\"mf\">.</span><span class=\"n\">amzn_reviews_co</span> \n",
       "<span class=\"k\">GROUP</span> <span class=\"k\">BY</span> <span class=\"mf\">4</span><span class=\"p\">,</span> <span class=\"mf\">5</span><span class=\"p\">,</span> <span class=\"mf\">6</span><span class=\"p\">,</span> <span class=\"mf\">7</span><span class=\"p\">,</span> <span class=\"mf\">8</span><span class=\"p\">,</span> <span class=\"mf\">9</span><span class=\"p\">;</span>\n",
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