64 lines
2.0 KiB
SQL
64 lines
2.0 KiB
SQL
--テーブル作成
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CREATE TABLE item_category (
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category_id INT PRIMARY KEY AUTO_INCREMENT COMMENT 'カテゴリID',
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category_name VARCHAR(256) NOT NULL COMMENT 'カテゴリ名'
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);
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--データ登録
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INSERT INTO item_category VALUES(NULL, '家具');
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INSERT INTO item_category VALUES(NULL, '飲料');
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INSERT INTO item_category VALUES(NULL, '食品');
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--テーブル作成2
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CREATE TABLE items (
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item_id INT PRIMARY KEY AUTO_INCREMENT COMMENT 'アイテムID',
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name VARCHAR(256) NOT NULL COMMENT 'アイテム名',
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price INT NOT NULL COMMENT '価格',
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category_id INT COMMENT 'カテゴリID',
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FOREIGN KEY (category_id)
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REFERENCES item_category(category_id)
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);
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--登録
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INSERT INTO items VALUES(NULL, 'ローマのテーブル', 150000, 1);
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INSERT INTO items VALUES(NULL, 'げーたるーど2000 500ml', 370, 2);
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INSERT INTO items VALUES(NULL, '原点飴', 2500, 3);
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INSERT INTO items VALUES(NULL, '魅惑の椅子', 100000, 1);
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--問3,4,5
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SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
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FROM items
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INNER JOIN item_category
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ON items.category_id = item_category.category_id
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WHERE item_category.category_name = '家具'
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ORDER BY items.price ASC;
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---問6
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SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
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FROM items
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INNER JOIN item_category
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ON items.category_id = item_category.category_id
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WHERE items.price BETWEEN 1000 AND 50000;
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--問7
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SELECT COUNT (*) AS data_count FROM items;
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--問8
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SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
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FROM items
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INNER JOIN item_category
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ON items.category_id = item_category.category_id
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WHERE items.price = (SELECT MAX(price) FROM items);
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--問9
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SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
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FROM items
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INNER JOIN item_category
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ON items.category_id = item_category.category_id
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WHERE items.name LIKE '%の%';
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