diff --git a/【練習問題】 SQL/Question1/MySQL SQL問題集 part２+α.txt b/【練習問題】 SQL/Question1/MySQL SQL問題集 part２+α.txt new file mode 100644 index 0000000..cbd8812 --- /dev/null +++ b/【練習問題】 SQL/Question1/MySQL SQL問題集 part２+α.txt @@ -0,0 +1,483 @@ +MySQL SQL問題集 part２+α + +mysql> INSERT INTO items VALUES (5,'十八茶 600ml',110,1); +Query OK, 1 row affected (0.01 sec) + +mysql> INSERT INTO items VALUES (6,'いい匂いのするドリアン',5000,3); +Query OK, 1 row affected (0.01 sec) + +mysql> INSERT INTO items VALUES (7,'太平洋の水 550ml',300,2); +Query OK, 1 row affected (0.01 sec) + +mysql> INSERT INTO items VALUES (8,'ひたすら膨らむガム',200,2); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO items VALUES (9,'人をだめにするソファー',10000,1); +Query OK, 1 row affected (0.01 sec) + +mysql> INSERT INTO items VALUES (10,'人を虜にする名酒',20000,2); +Query OK, 1 row affected (0.01 sec) + +mysql> INSERT INTO items VALUES (11,'新鮮キャベツ',1000,3); +Query OK, 1 row affected (0.00 sec) + +mysql> SELECT items.category_id,items.item_id,items.name,items.price,item_category.category_name FROM item_category INNER JOIN items ON items.category_id = item_category.category_id; ++-------------+---------+--------------------------+--------+---------------+ +| category_id | item_id | name | price | category_name | ++-------------+---------+--------------------------+--------+---------------+ +| 1 | 1 | ローマのテーブル | 150000 | 家具 | +| 1 | 4 | 魅惑の椅子 | 100000 | 家具 | +| 1 | 5 | 十八茶 600ml | 110 | 家具 | +| 1 | 9 | 人をだめにするソファー | 10000 | 家具 | +| 2 | 2 | げーたるーど2000 500ｍｌ | 370 | 飲料 | +| 2 | 7 | 太平洋の水 550ml | 300 | 飲料 | +| 2 | 8 | ひたすら膨らむガム | 200 | 飲料 | +| 2 | 10 | 人を虜にする名酒 | 20000 | 飲料 | +| 3 | 3 | 原始肉 | 2500 | 食品 | +| 3 | 6 | いい匂いのするドリアン | 5000 | 食品 | +| 3 | 11 | 新鮮キャベツ | 1000 | 食品 | ++-------------+---------+--------------------------+--------+---------------+ +11 rows in set (0.00 sec) + +mysql> SELECT items.category_id,items.item_id,items.name,items.price,item_category.category_name FROM item_category INNER JOIN items ON items.category_id = item_category.category_id ORDER BY item_id ASC; ++-------------+---------+--------------------------+--------+---------------+ +| category_id | item_id | name | price | category_name | ++-------------+---------+--------------------------+--------+---------------+ +| 1 | 1 | ローマのテーブル | 150000 | 家具 | +| 2 | 2 | げーたるーど2000 500ｍｌ | 370 | 飲料 | +| 3 | 3 | 原始肉 | 2500 | 食品 | +| 1 | 4 | 魅惑の椅子 | 100000 | 家具 | +| 1 | 5 | 十八茶 600ml | 110 | 家具 | +| 3 | 6 | いい匂いのするドリアン | 5000 | 食品 | +| 2 | 7 | 太平洋の水 550ml | 300 | 飲料 | +| 2 | 8 | ひたすら膨らむガム | 200 | 飲料 | +| 1 | 9 | 人をだめにするソファー | 10000 | 家具 | +| 2 | 10 | 人を虜にする名酒 | 20000 | 飲料 | +| 3 | 11 | 新鮮キャベツ | 1000 | 食品 | ++-------------+---------+--------------------------+--------+---------------+ +11 rows in set (0.00 sec) + +mysql> SELECT * FROM items; ++---------+--------------------------+--------+-------------+ +| item_id | name | price | category_id | ++---------+--------------------------+--------+-------------+ +| 1 | ローマのテーブル | 150000 | 1 | +| 2 | げーたるーど2000 500ｍｌ | 370 | 2 | +| 3 | 原始肉 | 2500 | 3 | +| 4 | 魅惑の椅子 | 100000 | 1 | +| 5 | 十八茶 600ml | 110 | 1 | +| 6 | いい匂いのするドリアン | 5000 | 3 | +| 7 | 太平洋の水 550ml | 300 | 2 | +| 8 | ひたすら膨らむガム | 200 | 2 | +| 9 | 人をだめにするソファー | 10000 | 1 | +| 10 | 人を虜にする名酒 | 20000 | 2 | +| 11 | 新鮮キャベツ | 1000 | 3 | ++---------+--------------------------+--------+-------------+ +11 rows in set (0.00 sec) + +mysql> DROP TABLE IF EXISTS order_items; +Query OK, 0 rows affected, 1 warning (0.02 sec) + +mysql> DROP TABLE IF EXISTS orders; +Query OK, 0 rows affected, 1 warning (0.00 sec) + +mysql> DROP TABLE IF EXISTS items; +Query OK, 0 rows affected (0.02 sec) + +mysql> DROP TABLE IF EXISTS item_category; +Query OK, 0 rows affected (0.01 sec) + +mysql> DROP TABLE IF EXISTS users; +Query OK, 0 rows affected, 1 warning (0.00 sec) + +mysql> +mysql> CREATE TABLE users( + -> user_id INT PRIMARY KEY AUTO_INCREMENT COMMENT 'ユーザID' + -> , name VARCHAR (15) NOT NULL COMMENT 'ユーザ名' + -> , password VARCHAR (50) NOT NULL COMMENT 'パスワード' + -> , age INT COMMENT '年齢' + -> , is_del CHAR (1) NOT NULL DEFAULT '0' COMMENT '削除フラグ:0：未削除、1：削除済' + -> ) + -> default charset=utf8 + -> COMMENT 'ユーザテーブル'; +Query OK, 0 rows affected, 1 warning (0.02 sec) + +mysql> +mysql> CREATE TABLE item_category( + -> category_id INT AUTO_INCREMENT PRIMARY KEY COMMENT 'カテゴリID' + -> , name VARCHAR (256) NOT NULL COMMENT 'カテゴリ名' + -> , is_del CHAR (1) NOT NULL DEFAULT '0' COMMENT '削除フラグ:0：未削除、1：削除済' + -> ) + -> default charset=utf8 + -> COMMENT 'カテゴリテーブル'; +Query OK, 0 rows affected, 1 warning (0.02 sec) + +mysql> +mysql> CREATE TABLE items( + -> item_id INT PRIMARY KEY AUTO_INCREMENT COMMENT '商品ID' + -> , name VARCHAR (255) NOT NULL COMMENT '商品名' + -> , price INT NOT NULL COMMENT '価格' + -> , category_id INT COMMENT 'カテゴリID' + -> , is_sale CHAR (1) NOT NULL DEFAULT '1' COMMENT '販売有無:1：販売中、0：販売無' + -> , is_del CHAR (1) NOT NULL DEFAULT '0' COMMENT '削除フラグ:0：未削除、1：削除済' + -> , FOREIGN KEY fk_categoryid(category_id) REFERENCES item_category(category_id) + -> ) + -> default charset=utf8 + -> COMMENT '商品テーブル'; +Query OK, 0 rows affected, 1 warning (0.03 sec) + +mysql> +mysql> CREATE TABLE orders( + -> order_id INT PRIMARY KEY AUTO_INCREMENT COMMENT '注文ID' + -> , user_id INT NOT NULL COMMENT 'ユーザID' + -> , order_time DATETIME NOT NULL COMMENT '注文日時' + -> , is_del CHAR (1) NOT NULL DEFAULT '0' COMMENT '削除フラグ:0：未削除、1：削除済' + -> , FOREIGN KEY fk_userid(user_id) REFERENCES users(user_id) + -> ) + -> default charset=utf8 + -> COMMENT '注文テーブル'; +Query OK, 0 rows affected, 1 warning (0.04 sec) + +mysql> +mysql> CREATE TABLE order_items( + -> order_id INT COMMENT '注文ID' + -> , item_id INT COMMENT '商品ID' + -> , quantity INT COMMENT '注文数' + -> , PRIMARY KEY (order_id, item_id) + -> , FOREIGN KEY fk_orderid(order_id) REFERENCES orders(order_id) + -> , FOREIGN KEY fk_itemid(item_id) REFERENCES items(item_id) + -> ) + -> default charset=utf8 + -> COMMENT '注文商品テーブル'; +Query OK, 0 rows affected, 1 warning (0.05 sec) + +mysql> +mysql> +mysql> INSERT INTO users (name, password, age) VALUES ('三浦知一','KfCQDjiZ', 53); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO users (name, password, age) VALUES ('遠藤保','V3mngzMP', 40); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO users (name, password, age) VALUES ('柴崎学','XktKCvCx', 27); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO users (name, password, age) VALUES ('本田啓介','bSCebKnP', 33); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO users (name, password, age) VALUES ('花川真司','xKetmAcH', 30); +Query OK, 1 row affected (0.00 sec) + +mysql> +mysql> INSERT INTO item_category (name) VALUES ('家具'); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO item_category (name) VALUES ('飲料'); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO item_category (name) VALUES ('食品'); +Query OK, 1 row affected (0.00 sec) + +mysql> +mysql> INSERT INTO items (name, price, category_id) VALUES ('ローマのテーブル', 150000, 1); +Query OK, 1 row affected (0.01 sec) + +mysql> INSERT INTO items (name, price, category_id) VALUES ('げーたるーど2000 500ml', 370, 2); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO items (name, price, category_id) VALUES ('原始肉', 2500, 3); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO items (name, price, category_id) VALUES ('魅惑の椅子', 100000, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO items (name, price, category_id) VALUES ('十八茶 600ml', 110, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO items (name, price, category_id) VALUES ('いい匂いのするドリアン', 5000, 3); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO items (name, price, category_id) VALUES ('太平洋の水 550ml', 300, 2); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO items (name, price, category_id) VALUES ('ひたすら膨らむガム', 200, 3); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO items (name, price, category_id) VALUES ('人をだめにするソファー', 10000, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO items (name, price, category_id) VALUES ('人を虜にする名酒', 20000, 2); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO items (name, price, category_id) VALUES ('新鮮キャベツ', 1000, 3); +Query OK, 1 row affected (0.00 sec) + +mysql> +mysql> INSERT INTO orders (user_id, order_time) VALUES (1, '2015-02-22 12:00:00'); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO orders (user_id, order_time) VALUES (4, '2015-12-01 15:30:00'); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO orders (user_id, order_time) VALUES (3, '2018-03-20 18:45:00'); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO orders (user_id, order_time) VALUES (2, '2018-05-11 11:28:00'); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO orders (user_id, order_time) VALUES (5, '2018-09-30 10:50:00'); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO orders (user_id, order_time) VALUES (1, '2018-09-12 20:13:00'); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO orders (user_id, order_time) VALUES (4, '2018-09-15 21:34:00'); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO orders (user_id, order_time) VALUES (1, '2019-05-06 16:00:00'); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO orders (user_id, order_time) VALUES (3, '2019-12-20 10:39:00'); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO orders (user_id, order_time) VALUES (2, '2020-01-01 14:11:00'); +Query OK, 1 row affected (0.00 sec) + +mysql> +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (1, 2, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (1, 6, 10); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (1, 7, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (1, 11, 10); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (2, 4, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (3, 9, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (4, 7, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (4, 8, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (5, 2, 7); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (5, 3, 5); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (5, 10, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (5, 11, 5); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (5, 5, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (5, 7, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (6, 8, 10); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (7, 4, 2); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (8, 1, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (8, 9, 1); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (9, 3, 4); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (9, 5, 2); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (9, 8, 10); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (10, 1, 2); +Query OK, 1 row affected (0.00 sec) + +mysql> INSERT INTO order_items (order_id, item_id, quantity) VALUES (10, 10, 2); +Query OK, 1 row affected (0.01 sec) + +mysql> SELECT * FROM items; ++---------+------------------------+--------+-------------+---------+--------+ +| item_id | name | price | category_id | is_sale | is_del | ++---------+------------------------+--------+-------------+---------+--------+ +| 1 | ローマのテーブル | 150000 | 1 | 1 | 0 | +| 2 | げーたるーど2000 500ml | 370 | 2 | 1 | 0 | +| 3 | 原始肉 | 2500 | 3 | 1 | 0 | +| 4 | 魅惑の椅子 | 100000 | 1 | 1 | 0 | +| 5 | 十八茶 600ml | 110 | 1 | 1 | 0 | +| 6 | いい匂いのするドリアン | 5000 | 3 | 1 | 0 | +| 7 | 太平洋の水 550ml | 300 | 2 | 1 | 0 | +| 8 | ひたすら膨らむガム | 200 | 3 | 1 | 0 | +| 9 | 人をだめにするソファー | 10000 | 1 | 1 | 0 | +| 10 | 人を虜にする名酒 | 20000 | 2 | 1 | 0 | +| 11 | 新鮮キャベツ | 1000 | 3 | 1 | 0 | ++---------+------------------------+--------+-------------+---------+--------+ +11 rows in set (0.00 sec) + +mysql> ALTER TABLE items RENAME COLUMN item_id TO '商品ID'; +ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''商品ID'' at line 1 +mysql> ALTER TABLE items RENAME COLUMN item_id TO `商品ID`; +Query OK, 0 rows affected (0.02 sec) +Records: 0 Duplicates: 0 Warnings: 0 + +mysql> SELECT * FROM items; ++--------+------------------------+--------+-------------+---------+--------+ +| 商品ID | name | price | category_id | is_sale | is_del | ++--------+------------------------+--------+-------------+---------+--------+ +| 1 | ローマのテーブル | 150000 | 1 | 1 | 0 | +| 2 | げーたるーど2000 500ml | 370 | 2 | 1 | 0 | +| 3 | 原始肉 | 2500 | 3 | 1 | 0 | +| 4 | 魅惑の椅子 | 100000 | 1 | 1 | 0 | +| 5 | 十八茶 600ml | 110 | 1 | 1 | 0 | +| 6 | いい匂いのするドリアン | 5000 | 3 | 1 | 0 | +| 7 | 太平洋の水 550ml | 300 | 2 | 1 | 0 | +| 8 | ひたすら膨らむガム | 200 | 3 | 1 | 0 | +| 9 | 人をだめにするソファー | 10000 | 1 | 1 | 0 | +| 10 | 人を虜にする名酒 | 20000 | 2 | 1 | 0 | +| 11 | 新鮮キャベツ | 1000 | 3 | 1 | 0 | ++--------+------------------------+--------+-------------+---------+--------+ +11 rows in set (0.00 sec) + +mysql> ALTER TABLE items RENAME COLUMN name TO `商品名`; +Query OK, 0 rows affected (0.03 sec) +Records: 0 Duplicates: 0 Warnings: 0 + +mysql> ALTER TABLE items RENAME COLUMN price TO `価格`; +Query OK, 0 rows affected (0.01 sec) +Records: 0 Duplicates: 0 Warnings: 0 + +mysql> ALTER TABLE items RENAME COLUMN category_id TO `カテゴリ名`; +Query OK, 0 rows affected (0.01 sec) +Records: 0 Duplicates: 0 Warnings: 0 + +mysql> SELECT * FROM items; ++--------+------------------------+--------+------------+---------+--------+ +| 商品ID | 商品名 | 価格 | カテゴリ名 | is_sale | is_del | ++--------+------------------------+--------+------------+---------+--------+ +| 1 | ローマのテーブル | 150000 | 1 | 1 | 0 | +| 2 | げーたるーど2000 500ml | 370 | 2 | 1 | 0 | +| 3 | 原始肉 | 2500 | 3 | 1 | 0 | +| 4 | 魅惑の椅子 | 100000 | 1 | 1 | 0 | +| 5 | 十八茶 600ml | 110 | 1 | 1 | 0 | +| 6 | いい匂いのするドリアン | 5000 | 3 | 1 | 0 | +| 7 | 太平洋の水 550ml | 300 | 2 | 1 | 0 | +| 8 | ひたすら膨らむガム | 200 | 3 | 1 | 0 | +| 9 | 人をだめにするソファー | 10000 | 1 | 1 | 0 | +| 10 | 人を虜にする名酒 | 20000 | 2 | 1 | 0 | +| 11 | 新鮮キャベツ | 1000 | 3 | 1 | 0 | ++--------+------------------------+--------+------------+---------+--------+ +11 rows in set (0.00 sec) + +mysql> SELECT * FROM orders; ++----------+---------+---------------------+--------+ +| order_id | user_id | order_time | is_del | ++----------+---------+---------------------+--------+ +| 1 | 1 | 2015-02-22 12:00:00 | 0 | +| 2 | 4 | 2015-12-01 15:30:00 | 0 | +| 3 | 3 | 2018-03-20 18:45:00 | 0 | +| 4 | 2 | 2018-05-11 11:28:00 | 0 | +| 5 | 5 | 2018-09-30 10:50:00 | 0 | +| 6 | 1 | 2018-09-12 20:13:00 | 0 | +| 7 | 4 | 2018-09-15 21:34:00 | 0 | +| 8 | 1 | 2019-05-06 16:00:00 | 0 | +| 9 | 3 | 2019-12-20 10:39:00 | 0 | +| 10 | 2 | 2020-01-01 14:11:00 | 0 | ++----------+---------+---------------------+--------+ +10 rows in set (0.00 sec) + +mysql> SELECT * FROM order_items; ++----------+---------+----------+ +| order_id | item_id | quantity | ++----------+---------+----------+ +| 1 | 2 | 1 | +| 1 | 6 | 10 | +| 1 | 7 | 1 | +| 1 | 11 | 10 | +| 2 | 4 | 1 | +| 3 | 9 | 1 | +| 4 | 7 | 1 | +| 4 | 8 | 1 | +| 5 | 2 | 7 | +| 5 | 3 | 5 | +| 5 | 5 | 1 | +| 5 | 7 | 1 | +| 5 | 10 | 1 | +| 5 | 11 | 5 | +| 6 | 8 | 10 | +| 7 | 4 | 2 | +| 8 | 1 | 1 | +| 8 | 9 | 1 | +| 9 | 3 | 4 | +| 9 | 5 | 2 | +| 9 | 8 | 10 | +| 10 | 1 | 2 | +| 10 | 10 | 2 | ++----------+---------+----------+ +23 rows in set (0.00 sec) + +mysql> SELECT * FROM users; ++---------+----------+----------+------+--------+ +| user_id | name | password | age | is_del | ++---------+----------+----------+------+--------+ +| 1 | 三浦知一 | KfCQDjiZ | 53 | 0 | +| 2 | 遠藤保 | V3mngzMP | 40 | 0 | +| 3 | 柴崎学 | XktKCvCx | 27 | 0 | +| 4 | 本田啓介 | bSCebKnP | 33 | 0 | +| 5 | 花川真司 | xKetmAcH | 30 | 0 | ++---------+----------+----------+------+--------+ +5 rows in set (0.00 sec) + +mysql> SELECT * FROM item_category; ++-------------+------+--------+ +| category_id | name | is_del | ++-------------+------+--------+ +| 1 | 家具 | 0 | +| 2 | 飲料 | 0 | +| 3 | 食品 | 0 | ++-------------+------+--------+ +3 rows in set (0.00 sec) + +mysql> SELECT order.id,user_id,order_time,item_id,quantity FROM order_items INNER JOIN orders ON order_id = order_items.order_id; +ERROR 1054 (42S22): Unknown column 'order.id' in 'field list' +mysql> SELECT `商品ID`,`商品名`,`価格`,`カテゴリ名` FROM items; ++--------+------------------------+--------+------------+ +| 商品ID | 商品名 | 価格 | カテゴリ名 | ++--------+------------------------+--------+------------+ +| 1 | ローマのテーブル | 150000 | 1 | +| 2 | げーたるーど2000 500ml | 370 | 2 | +| 3 | 原始肉 | 2500 | 3 | +| 4 | 魅惑の椅子 | 100000 | 1 | +| 5 | 十八茶 600ml | 110 | 1 | +| 6 | いい匂いのするドリアン | 5000 | 3 | +| 7 | 太平洋の水 550ml | 300 | 2 | +| 8 | ひたすら膨らむガム | 200 | 3 | +| 9 | 人をだめにするソファー | 10000 | 1 | +| 10 | 人を虜にする名酒 | 20000 | 2 | +| 11 | 新鮮キャベツ | 1000 | 3 | ++--------+------------------------+--------+------------+ +11 rows in set (0.00 sec) + +mysql> items.`商品ID`,items.`商品名`,items.`価格,items,`カテゴリ名` FROM item_category INNER JOIN items.`カテゴリ名` = item_category.category_id; + `> ^C +mysql> items.`商品ID`,items.`商品名`,items.`価格,items,`カテゴリ名` FROM item_category INNER JOIN items.`カテゴリ名` = item_category.category_id; + `> ^C +mysql> SELECT items.`商品ID`, items.`商品名`, items.`価格`, item_category.`カテゴリ名` FROM items INNER JOIN item_category ON items.`カテゴリID` = item_category.category_id; +ERROR 1054 (42S22): Unknown column 'item_category.カテゴリ名' in 'field list' +mysql> \ No newline at end of file