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>