fix: requests, migration to create relations genres and publishers

migration.sql

@@ -0,0 +1,41 @@
+CREATE TABLE IF NOT EXISTS genres (
+    genre_id SERIAL PRIMARY KEY,
+    name VARCHAR(30) NOT NULL UNIQUE
+);
+
+CREATE TABLE IF NOT EXISTS publishers (
+    publisher_id SERIAL PRIMARY KEY,
+    name VARCHAR(50) NOT NULL UNIQUE
+);
+
+INSERT INTO genres (name)
+SELECT DISTINCT genre
+FROM board_games
+WHERE genre IS NOT NULL;
+
+INSERT INTO publishers (name)
+SELECT DISTINCT publisher
+FROM board_games
+WHERE publisher IS NOT NULL;
+
+ALTER TABLE board_games
+ADD COLUMN genre_id INT,
+ADD COLUMN publisher_id INT;
+
+UPDATE board_games
+SET genre_id = g.genre_id
+FROM genres g
+WHERE board_games.genre = g.name;
+
+UPDATE board_games
+SET publisher_id = p.publisher_id
+FROM publishers p
+WHERE board_games.publisher = p.name;
+
+ALTER TABLE board_games
+DROP COLUMN genre,
+DROP COLUMN publisher;
+
+ALTER TABLE board_games
+ADD CONSTRAINT fk_genre FOREIGN KEY (genre_id) REFERENCES genres (genre_id),
+ADD CONSTRAINT fk_publisher FOREIGN KEY (publisher_id) REFERENCES publishers (publisher_id);

requests.sql

@@ -0,0 +1,46 @@
+--- Зарегистрировать нового пользователя
+insert into clients (forename, surname, patronymic, age, phone_number, email)
+values ('Иван', 'Иванович', 'Иванов', 22, '+71234567890', 'test@email.com');
+
+--- Вывести доступные категории настольных игр
+select name from sections;
+
+--- Вывод названия игры и цена при условии что цена меньше 2000 руб (для незарегистрированного пользователя)
+set lc_monetary to 'ru_RU.UTF-8';
+select name, price
+from board_games
+where price::numeric < 2000;
+
+--- Вывод самых дорогих игр с жанрами и издателями
+set lc_monetary to 'ru_RU.UTF-8';
+select
+    board_games.name as name,
+    genres.name as genre,
+    publishers.name as publisher,
+    board_games.price as price
+from
+    board_games
+    join genres using(genre_id)
+    join publishers using(publisher_id)
+order by
+    price desc
+limit 10;
+
+--- Вывод количества продаж за период
+set lc_monetary to 'ru_RU.UTF-8';
+select
+    board_games.name as name,
+    publishers.name as publisher,
+    board_games.price as price,
+    sum(orders_games.count) as sells
+from
+    board_games
+    join publishers using(publisher_id)
+    join orders_games using(board_game_id)
+    join orders using(order_id)
+where
+    orders.order_date BETWEEN '2024-12-16' AND '2024-12-20';
+group by
+    board_games.name, publishers.name, board_games.price
+order by
+    publishers.name