Added new assignments

[Databases]
~/R2S2/

Author: Guliveer

R2S2/Bazy Danych (L)/.idea/sqldialects.xml

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+-- Zadanie 02
+
+-- Sprawdzenie aktualnego statusu sprawdzania kluczy obcych (opcjonalnie)
+SELECT @@FOREIGN_KEY_CHECKS;
+
+-- Wyłączenie sprawdzania kluczy obcych
+SET FOREIGN_KEY_CHECKS = 0;
+
+-- Kasowanie danych z tabel
+DELETE FROM customer;
+DELETE FROM dept;
+DELETE FROM emp;
+DELETE FROM inventory;
+DELETE FROM item;
+DELETE FROM ord;
+DELETE FROM price_category;
+DELETE FROM product;
+DELETE FROM region;
+DELETE FROM title;
+DELETE FROM warehouse;
+
+-- Włączenie sprawdzania kluczy obcych
+SET FOREIGN_KEY_CHECKS = 1;
+
+-- Sprawdzenie czy ponownie włączone (opcjonalnie)
+SELECT @@FOREIGN_KEY_CHECKS;

R2S2/Bazy Danych (L)/Lab09/zad02.sql

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+-- Zadanie 03
+
+
+-- region
+INSERT INTO region (id, name) VALUES
+    (1, 'North America'),
+    (2, 'Europe'),
+    (3, 'Asia'),
+    (4, 'South America'),
+    (5, 'Australia');
+
+
+-- dept
+INSERT INTO dept (id, name, region_id) VALUES
+    (1, 'Sales', 1),
+    (2, 'Marketing', 1),
+    (3, 'Engineering', 2),
+    (4, 'Support', 3),
+    (5, 'Finance', 1),
+    (6, 'IT', 2),
+    (7, 'Legal', 1),
+    (8, 'Operations', 4),
+    (9, 'Research', 2),
+    (10, 'Logistics', 4),
+    (11, 'HR', 3),
+    (12, 'Customer Success', 1),
+    (13, 'Procurement', 3),
+    (14, 'Analytics', 2),
+    (15, 'QA', 2);
+
+
+-- emp
+-- Styl 1: pełna lista kolumn
+INSERT INTO emp (id, last_name, first_name, userid, start_date, comments, manager_id, title, dept_id, salary, commission_pct) VALUES
+    (1, 'Smith', 'John', 'jsmith', '2020-01-15', NULL, NULL, 'CEO', 1, 150000.00, NULL),
+    (2, 'Taylor', 'Alice', 'ataylor', '2021-03-22', NULL, 1, 'CTO', 1, 130000.00, NULL),
+    (3, 'Brown', 'Charlie', 'cbrown', '2022-07-10', NULL, 2, 'Manager', 2, 95000.00, NULL),
+    (4, 'White', 'Emily', 'ewhite', '2023-01-05', NULL, 3, 'Engineer', 1, 85000.00, 0.05),
+    (5, 'Green', 'Daniel', 'dgreen', '2021-06-19', NULL, 3, 'Engineer', 1, 87000.00, 0.07),
+    (6, 'Black', 'Sophia', 'sblack', '2020-11-03', NULL, 3, 'Marketing Specialist', 2, 65000.00, NULL),
+    (7, 'King', 'Oliver', 'oking', '2023-04-28', NULL, 3, 'Intern', 1, 20000.00, NULL),
+    (8, 'Wright', 'Mia', 'mwright', '2021-09-15', NULL, 2, 'HR Specialist', 4, 60000.00, NULL),
+    (9, 'Scott', 'Jacob', 'jscott', '2022-05-20', NULL, 2, 'Engineer', 1, 88000.00, NULL),
+    (10, 'Bell', 'Emma', 'ebell', '2019-08-13', NULL, 3, 'Sales Representative', 3, 62000.00, 0.1);
+
+-- Styl 2: insert bez nazw kolumn (kolejność musi odpowiadać tabeli!)
+INSERT INTO emp VALUES
+    (11, 'Adams', 'Grace', 'gadams', '2020-02-11', NULL, 3, 'Engineer', 1, 83000.00, NULL),
+    (12, 'Baker', 'Henry', 'hbaker', '2021-10-01', NULL, 3, 'Engineer', 1, 81000.00, 0.05),
+    (13, 'Carter', 'Liam', 'lcarter', '2020-12-20', NULL, 3, 'Engineer', 1, 80000.00, NULL),
+    (14, 'Davis', 'Ella', 'edavis', '2022-06-08', NULL, 3, 'Engineer', 1, 79000.00, NULL),
+    (15, 'Evans', 'Noah', 'nevans', '2023-02-15', NULL, 3, 'Engineer', 1, 77000.00, NULL),
+    (16, 'Foster', 'Ava', 'afoster', '2022-09-25', NULL, 3, 'Marketing Specialist', 2, 63000.00, NULL),
+    (17, 'Graham', 'Mason', 'mgraham', '2020-10-30', NULL, 3, 'Sales Representative', 3, 61000.00, 0.12),
+    (18, 'Hall', 'Isabella', 'ihall', '2021-04-18', NULL, 3, 'Sales Representative', 3, 60000.00, 0.09),
+    (19, 'Irwin', 'James', 'jirwin', '2020-07-07', NULL, 3, 'Engineer', 1, 75000.00, NULL),
+    (20, 'Jones', 'Lily', 'ljones', '2023-03-12', NULL, 3, 'Intern', 1, 18000.00, NULL);
+
+
+-- customer
+INSERT INTO customer (id, name, region_id) VALUES
+    (1, 'Beisbol Si!', 4),
+    (2, 'Sweet Rock Sports', 1),
+    (3, 'Sporta Russia', 3),
+    (4, 'Womansport', 2),
+    (5, 'Hamada Sport', 3);

R2S2/Bazy Danych (L)/Lab09/zad03.sql

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+-- Zadanie 04
+
+-- Aktualizacja nazwisk na wielkie litery
+UPDATE emp
+    SET last_name = UPPER(last_name);
+
+-- Imię: pierwsza litera wielka, reszta małe (capitalize)
+UPDATE emp
+    SET first_name = CONCAT(UPPER(LEFT(first_name, 1)), LOWER(SUBSTRING(first_name, 2)));
+
+-- Podwyżka 100 zł
+UPDATE emp
+    SET salary = salary + 100;
+
+-- Zaokrąglanie daty do 1. dnia miesiąca (jeśli dzień > 15, to do kolejnego miesiąca)
+UPDATE emp
+    SET start_date = CASE
+        WHEN DAY(start_date) > 15
+            THEN DATE_FORMAT(DATE_ADD(LAST_DAY(start_date), INTERVAL 1 DAY), '%Y-%m-01')
+        ELSE DATE_FORMAT(start_date, '%Y-%m-01')
+    END;
+
+-- Zastąpienie NULL znakiem zapytania
+UPDATE emp
+    SET
+        first_name = IFNULL(first_name, '?'),
+        last_name = IFNULL(last_name, '?'),
+        userid = IFNULL(userid, '?'),
+        comments = IFNULL(comments, '?');
+
+-- Uzupełnienie kolumny comments zgodnie z formatem
+UPDATE emp e
+    JOIN dept d ON e.dept_id = d.id
+    JOIN region r ON d.region_id = r.id
+    SET e.comments = CONCAT(
+        e.first_name, ' ', e.last_name, ' : ',
+        UPPER(LEFT(e.first_name, 1)), '.', UPPER(LEFT(e.last_name, 1)), '. : ',
+        FORMAT(e.salary, 2), ' zł : ',
+        DATE_FORMAT(e.start_date, '%d-%m-%Y'), ' : ',
+        r.name, ' : ',
+        d.name
+    );

R2S2/Bazy Danych (L)/Lab09/zad04.sql

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+-- Zadanie 05
+
+-- Wyłączenie sprawdzania kluczy obcych (jeśli potrzebne)
+SET FOREIGN_KEY_CHECKS = 0;
+
+-- Usunięcie pracowników z działów 3 i 5
+DELETE FROM emp
+    WHERE dept_id IN (3, 5);
+
+-- Usunięcie działów 3 i 5
+DELETE FROM dept
+    WHERE id IN (3, 5);
+
+-- Ponowne włączenie sprawdzania kluczy obcych
+SET FOREIGN_KEY_CHECKS = 1;