Add SQL query to calculate lifetime downloads per episode for a given podcast

Author: woolfg

db_schema/queries/v1/reportHosterEpisodeLifetimeDownloads.sql

@@ -0,0 +1,58 @@
+-- Calculate lifetime downloads per episode for a given podcast (account_id)
+-- Lifetime downloads are calculated by summing all monthly download values per episode
+-- Monthly data has start = first day of month, end = last day of month
+-- +------------+------------+----------+---------------------+-----------+--------------------+
+-- | podcast_id | episode_id | ep_name  | ep_release_date     | hoster_id | lifetime_downloads |
+-- +------------+------------+----------+---------------------+-----------+--------------------+
+
+
+-- get subdimension id for downloads
+WITH download_subdimensions AS (
+    SELECT
+        dim_id, dim_name
+    FROM
+        subdimensions
+    WHERE
+        dim_name = 'complete'
+    LIMIT 1
+),
+-- sum all monthly values per episode
+-- monthly rows start on the first of a month and the end is the last day of the month
+episode_lifetime_downloads AS (
+    SELECT
+        account_id,
+        episode_id,
+        hoster_id,
+        dimension,
+        subdimension,
+        SUM(value) AS lifetime_downloads
+    FROM
+        hosterEpisodeMetrics
+    WHERE
+        account_id = @podcast_id
+        AND dimension = 'downloads'
+        AND subdimension = (SELECT dim_id FROM download_subdimensions)
+        -- monthly rows start on the first of a month and the end is the last day of the month
+        AND DAYOFMONTH(start) = 1 AND DATE(end) = LAST_DAY(start)
+    GROUP BY
+        account_id,
+        episode_id,
+        hoster_id,
+        dimension,
+        subdimension
+)
+
+SELECT
+    eld.account_id AS podcast_id,
+    eld.episode_id,
+    hmd.ep_name,
+    hmd.ep_release_date,
+    eld.hoster_id,
+    eld.lifetime_downloads as lifetime_downloads
+FROM
+    episode_lifetime_downloads eld
+JOIN 
+    hosterEpisodeMetadata hmd ON eld.account_id = hmd.account_id 
+    AND eld.episode_id = hmd.episode_id
+ORDER BY
+    eld.lifetime_downloads DESC;