完了済

Answers/Question2.txt

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+--Q1
+CREATE TABLE item_category (
+    category_id INT AUTO_INCREMENT COMMENT 'カテゴリID',
+    category_name VARCHAR(256) NOT NULL COMMENT 'カテゴリ名',
+    PRIMARY KEY (category_id)
+)
+INSERT INTO item_category (category_name) VALUES ('家具');
+INSERT INTO item_category (category_name) VALUES ('飲料');
+INSERT INTO item_category (category_name) VALUES ('食品');
+
+--Q2
+CREATE TABLE items (
+    item_id INT AUTO_INCREMENT COMMENT 'アイテムID',
+    name VARCHAR(256) NOT NULL COMMENT 'アイテム名',
+    price INT NOT NULL COMMENT '価格',
+    category_id INT COMMENT 'カテゴリID',
+    PRIMARY KEY (item_id),
+    FOREIGN KEY (category_id) REFERENCES item_category(category_id)
+)
+INSERT INTO items (name, price, category_id) VALUES ('ローマのテーブル', 150000, 1);
+INSERT INTO items (name, price, category_id) VALUES ('げーたるーど2000 500ml', 370, 2);
+INSERT INTO items (name, price, category_id) VALUES ('原始肉', 2500, 3);
+INSERT INTO items (name, price, category_id) VALUES ('魅惑の椅子', 100000, 1);
+
+--Q3
+SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
+FROM items INNER JOIN item_category ON items.category_id = item_category.category_id; 
+
+--Q4
+SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
+FROM items INNER JOIN item_category ON items.category_id = item_category.category_id
+ORDER BY price ASC;
+
+--Q5
+SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
+FROM items INNER JOIN item_category ON items.category_id = item_category.category_id
+WHERE category_name = '家具';
+
+--Q6
+SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
+FROM items INNER JOIN item_category ON items.category_id = item_category.category_id
+WHERE price BETWEEN 1000 AND 50000;
+
+--Q7
+SELECT COUNT(item_id) AS data_count FROM items;
+
+--Q8
+SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
+FROM items INNER JOIN item_category ON items.category_id = item_category.category_id
+WHERE items.price >= ALL (SELECT items.price FROM items);
+
+--Q9
+SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
+FROM items INNER JOIN item_category ON items.category_id = item_category.category_id
+WHERE items.name LIKE '%の%';