Lesson 7

HomeWork-Lesson7.sql

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+-- Составьте список пользователей users, которые осуществили хотя бы один заказ orders в интернет магазине.
+
+INSERT INTO orders (user_id)
+SELECT id FROM users WHERE name = 'Геннадий';
+
+INSERT INTO orders_products (order_id, product_id, total)
+SELECT LAST_INSERT_ID(), id, 2 FROM products
+WHERE name = 'Intel Core i5-7400';
+
+INSERT INTO orders (user_id)
+SELECT id FROM users WHERE name = 'Наталья';
+
+INSERT INTO orders_products (order_id, product_id, total)
+SELECT LAST_INSERT_ID(), id, 1 FROM products
+WHERE name IN ('Intel Core i5-7400', 'Gigabyte H310M S2H');
+
+INSERT INTO orders (user_id)
+SELECT id FROM users WHERE name = 'Иван';
+
+INSERT INTO orders_products (order_id, product_id, total)
+SELECT LAST_INSERT_ID(), id, 1 FROM products
+WHERE name IN ('AMD FX-8320', 'ASUS ROG MAXIMUS X HERO');
+
+SELECT id, name, birthday_at FROM users;
+
+SELECT u.id, u.name, u.birthday_at
+  FROM users AS u
+   JOIN orders AS o
+     ON u.id = o.user_id;
+
+
+
+-- Выведите список товаров products и разделов catalogs, который соответствует товару.
+
+ELECT
+  p.id,
+  p.name,
+  p.price,
+  c.name AS catalog
+  FROM products AS p
+    LEFT JOIN catalogs AS c
+      ON p.catalog_id = c.id;