Compare commits
2 Commits
| Author | SHA1 | Date | |
|---|---|---|---|
|
a2ca833633 | ||
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5bf83a28e4 |
@@ -1,23 +0,0 @@
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問１
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テーブル作成
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CREATE TABLE book_table (book_id INT, book_name VARCHAR(50), author_name VARCHAR(50), price INT, sales_flag INT);
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問２
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INSERT INTO book_table VALUES (10001, 'TwoPeace', '三田英一郎', 420,1);
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INSERT INTO book_table VALUES (10002, '名探偵金田二', '青山ふみや', 460,1);
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INSERT INTO book_table VALUES (20001, '坊ちゃま', '冬目漱岩', 460,1);
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INSERT INTO book_table VALUES (30001, '西方見聞録', '不明', 1000,1);
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INSERT INTO book_table VALUES (40010, '吾輩は犬である', '冬目漱岩', 420,1);
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問３
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SELECT book_name , author_name FROM book_table;
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問４
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UPDATE book_table SET sales_flag= 0 WHERE book_id =30001;
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問５
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SELECT * FROM book_table WHERE sales_flag LIKE '%1%';
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問６
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SELECT * FROM book_table WHERE author_name = '冬目漱岩' AND price = 420;
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問７
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DELETE FROM book_table WHERE book_id = 20001;
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113
【練習問題】 SQL/Question1/book_table_清水.sql
Normal file
113
【練習問題】 SQL/Question1/book_table_清水.sql
Normal file
@@ -0,0 +1,113 @@
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Enter password: *********
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Welcome to the MySQL monitor. Commands end with ; or \g.
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Your MySQL connection id is 20
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Server version: 8.0.32 MySQL Community Server - GPL
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Copyright (c) 2000, 2023, Oracle and/or its affiliates.
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Oracle is a registered trademark of Oracle Corporation and/or its
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affiliates. Other names may be trademarks of their respective
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owners.
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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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mysql> CREATE TABLE book_table (
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-> \c
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mysql> ALTER TABLE book_table
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-> ADD book_id INT,
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-> ADD bookname VARCHAR(50),
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-> ADD author_name VARCHAR(50),
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-> ADD price INT,
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-> ADD sales,flag INT;
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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 ',flag INT' at line 6
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mysql> ALTER TABLE book_table
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-> -> ADD book_id INT,
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-> -> ADD bookname VARCHAR(50),
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-> -> ADD author_name VARCHAR(50),
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-> -> ADD price INT,
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-> -> ADD price INT,\c
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mysql> ALTER TABLE book_table
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-> ADD book_id INT,
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-> ADD book_name VARCHAR(50),
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-> ADD author_name VARCHAR(50),
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-> ADD price INT,
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-> ADD sales_flag INT;
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ERROR 1146 (42S02): Table 'book_table.book_table' doesn't exist
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mysql> SHOW TABLE;
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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 '' at line 1
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mysql> SHOW TABLES;
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Empty set (0.00 sec)
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mysql> CREATE TABLE book_table (
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-> book_id INT,
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-> book_name VARCHAR(50),
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-> author_name VARCHAR(50),
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-> price INT,
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-> sales_flag INT
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-> );
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Query OK, 0 rows affected (0.02 sec)
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mysql> INSERT INTO book_table
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-> VALUES(10001, 'TwoPeace', '三田英一郎', 420, 1),
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-> (10002, '名探偵金田二', '青山ふみや', 460, 1),
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-> (20001, '坊ちゃま', '冬目漱岩', 460, 1),
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-> (30001, '西方見聞録', '不明', 1000, 1),
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-> (40010, '吾輩は犬である', '冬目漱岩', 420, 1);
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Query OK, 5 rows affected (0.02 sec)
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Records: 5 Duplicates: 0 Warnings: 0
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mysql> SELECT book_name, author_name FROM book_table;
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+----------------+-------------+
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| book_name | author_name |
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+----------------+-------------+
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| TwoPeace | 三田英一郎 |
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| 名探偵金田二 | 青山ふみや |
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| 坊ちゃま | 冬目漱岩 |
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| 西方見聞録 | 不明 |
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| 吾輩は犬である | 冬目漱岩 |
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+----------------+-------------+
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5 rows in set (0.00 sec)
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mysql> UPDATE book_table SET author_name = 'マール＝コーニポロ', salse_flag = 0 WHERE book_id = 30001;
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ERROR 1054 (42S22): Unknown column 'salse_flag' in 'field list'
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mysql> UPDATE book_table SET author_name = 'マール＝コーニポロ', sales_flag = 0 WHERE book_id = 30001;
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Query OK, 1 row affected (0.01 sec)
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Rows matched: 1 Changed: 1 Warnings: 0
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mysql> SELECT * FROM book_table WHERE sales_flag = 1;
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+---------+----------------+-------------+-------+------------+
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| book_id | book_name | author_name | price | sales_flag |
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+---------+----------------+-------------+-------+------------+
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| 10001 | TwoPeace | 三田英一郎 | 420 | 1 |
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| 10002 | 名探偵金田二 | 青山ふみや | 460 | 1 |
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| 20001 | 坊ちゃま | 冬目漱岩 | 460 | 1 |
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| 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 |
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+---------+----------------+-------------+-------+------------+
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4 rows in set (0.00 sec)
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mysql> SELECT * FROM book_table WHERE author
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-> _name = '冬目漱岩' AND price = 420;
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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 '_name = '冬目漱岩' AND price = 420' at line 2
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mysql> SELECT * FROM book_table WHERE author_name = '冬目漱岩' AND price = 420;
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+---------+----------------+-------------+-------+------------+
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| book_id | book_name | author_name | price | sales_flag |
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+---------+----------------+-------------+-------+------------+
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| 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 |
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+---------+----------------+-------------+-------+------------+
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1 row in set (0.01 sec)
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mysql> DELETE FROM book_table WHERE book_id = 20001;
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Query OK, 1 row affected (0.02 sec)
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mysql> SELECT * FROM book_table;
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+---------+----------------+--------------------+-------+------------+
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| book_id | book_name | author_name | price | sales_flag |
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+---------+----------------+--------------------+-------+------------+
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| 10001 | TwoPeace | 三田英一郎 | 420 | 1 |
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| 10002 | 名探偵金田二 | 青山ふみや | 460 | 1 |
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| 30001 | 西方見聞録 | マール＝コーニポロ | 1000 | 0 |
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| 40010 | 吾輩は犬である | 冬目漱岩 | 420 | 1 |
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+---------+----------------+--------------------+-------+------------+
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4 rows in set (0.00 sec)
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mysql>
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@@ -1,68 +0,0 @@
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問題１
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mysql> SELECT
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-> i.item_id,
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-> i.name AS item_name,
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-> i.price,
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-> c.name AS category_name
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-> FROM items i
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-> INNER JOIN item_category c ON i.category_id = c.category_id
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-> ORDER BY i.item_id;
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+---------+------------------------+--------+---------------+
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| item_id | item_name | price | category_name |
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+---------+------------------------+--------+---------------+
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| 1 | ローマのテーブル | 150000 | 家具 |
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| 2 | げーたるーど2000 500ml | 370 | 飲料 |
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| 3 | 原始肉 | 2500 | 食品 |
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| 4 | 魅惑の椅子 | 100000 | 家具 |
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| 5 | 十八茶 600ml | 110 | 家具 |
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| 6 | いい匂いのするドリアン | 5000 | 食品 |
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| 7 | 太平洋の水 550ml | 300 | 飲料 |
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| 8 | ひたすら膨らむガム | 200 | 食品 |
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| 9 | 人をだめにするソファー | 10000 | 家具 |
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| 10 | 人を虜にする名酒 | 20000 | 飲料 |
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| 11 | 新鮮キャベツ | 1000 | 食品 |
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+---------+------------------------+--------+---------------+
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11 rows in set (0.00 sec)
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問題２
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mysql> SELECT
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-> o.order_id AS '注文ID',
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-> o.order_time AS '注文日時',
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-> u.name AS 'ユーザ名',
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-> i.name AS '商品名',
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-> i.price AS '価格',
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-> oi.quantity AS '数量'
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-> FROM orders o
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-> INNER JOIN users u ON o.user_id = u.user_id
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-> INNER JOIN order_items oi ON o.order_id = oi.order_id
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-> INNER JOIN items i ON oi.item_id = i.item_id
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-> ORDER BY o.order_id, i.item_id;
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+--------+---------------------+----------+------------------------+--------+------+
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| 注文ID | 注文日時 | ユーザ名 | 商品名 | 価格 | 数量 |
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+--------+---------------------+----------+------------------------+--------+------+
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| 1 | 2015-02-22 12:00:00 | 三浦知一 | げーたるーど2000 500ml | 370 | 1 |
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| 1 | 2015-02-22 12:00:00 | 三浦知一 | いい匂いのするドリアン | 5000 | 10 |
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| 1 | 2015-02-22 12:00:00 | 三浦知一 | 太平洋の水 550ml | 300 | 1 |
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| 1 | 2015-02-22 12:00:00 | 三浦知一 | 新鮮キャベツ | 1000 | 10 |
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| 2 | 2015-12-01 15:30:00 | 本田啓介 | 魅惑の椅子 | 100000 | 1 |
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| 3 | 2018-03-20 18:45:00 | 柴崎学 | 人をだめにするソファー | 10000 | 1 |
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| 4 | 2018-05-11 11:28:00 | 遠藤保 | 太平洋の水 550ml | 300 | 1 |
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| 4 | 2018-05-11 11:28:00 | 遠藤保 | ひたすら膨らむガム | 200 | 1 |
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| 5 | 2018-09-30 10:50:00 | 花川真司 | げーたるーど2000 500ml | 370 | 7 |
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| 5 | 2018-09-30 10:50:00 | 花川真司 | 原始肉 | 2500 | 5 |
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| 5 | 2018-09-30 10:50:00 | 花川真司 | 十八茶 600ml | 110 | 1 |
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| 5 | 2018-09-30 10:50:00 | 花川真司 | 太平洋の水 550ml | 300 | 1 |
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| 5 | 2018-09-30 10:50:00 | 花川真司 | 人を虜にする名酒 | 20000 | 1 |
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| 5 | 2018-09-30 10:50:00 | 花川真司 | 新鮮キャベツ | 1000 | 5 |
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| 6 | 2018-09-12 20:13:00 | 三浦知一 | ひたすら膨らむガム | 200 | 10 |
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| 7 | 2018-09-15 21:34:00 | 本田啓介 | 魅惑の椅子 | 100000 | 2 |
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| 8 | 2019-05-06 16:00:00 | 三浦知一 | ローマのテーブル | 150000 | 1 |
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| 8 | 2019-05-06 16:00:00 | 三浦知一 | 人をだめにするソファー | 10000 | 1 |
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| 9 | 2019-12-20 10:39:00 | 柴崎学 | 原始肉 | 2500 | 4 |
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| 9 | 2019-12-20 10:39:00 | 柴崎学 | 十八茶 600ml | 110 | 2 |
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| 9 | 2019-12-20 10:39:00 | 柴崎学 | ひたすら膨らむガム | 200 | 10 |
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| 10 | 2020-01-01 14:11:00 | 遠藤保 | ローマのテーブル | 150000 | 2 |
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| 10 | 2020-01-01 14:11:00 | 遠藤保 | 人を虜にする名酒 | 20000 | 2 |
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+--------+---------------------+----------+------------------------+--------+------+
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23 rows in set (0.00 sec)
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@@ -1,132 +0,0 @@
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問題1
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mysql> CREATE TABLE item_category (
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-> category_id INT AUTO_INCREMENT PRIMARY KEY,
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-> category_name VARCHAR(256) NOT NULL
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-> );
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Query OK, 0 rows affected (0.03 sec)
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mysql> INSERT INTO item_category ('家具');
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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 ''家具')' at line 1
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mysql> ^C
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mysql>
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mysql> INSERT INTO item_category (category_name) VALUES ('家具');
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Query OK, 1 row affected (0.01 sec)
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mysql> INSERT INTO item_category (category_name) VALUES ('飲料');
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Query OK, 1 row affected (0.00 sec)
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mysql> INSERT INTO item_category (category_name) VALUES ('食品');
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Query OK, 1 row affected (0.00 sec)
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mysql> SELECT * FROM item_category;
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+-------------+---------------+
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| category_id | category_name |
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+-------------+---------------+
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| 1 | 家具 |
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| 2 | 飲料 |
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| 3 | 食品 |
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+-------------+---------------+
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3 rows in set (0.00 sec)
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問題２
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CREATE TABLE items ( item_id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(256), price INT, category_id INT, FOREIGN KEY (category_id) REFERENCES item_category(category_id));
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INSERT INTO items (name, price, category_id)
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-> VALUES ('ローマのテーブル', 150000, 1);
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INSERT INTO items (name, price, category_id) VALUES ('げーたるど2000 500 ml', 370, 2);
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mysql> INSERT INTO items (name, price, category_id) VALUES ('原始肉', 2500, 3);
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Query OK, 1 row affected (0.00 sec)
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mysql> INSERT INTO items (name, price, category_id) VALUES ('魅惑の橋子', 100000, 1);
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Query OK, 1 row affected (0.00 sec)
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問題３
|
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SELECT * FROM items JOIN item_category USING (category_id);
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+-------------+---------+-----------------------+--------+---------------+
|
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| category_id | item_id | name | price | category_name |
|
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+-------------+---------+-----------------------+--------+---------------+
|
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| 1 | 1 | ローマのテーブル | 150000 | 家具 |
|
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| 1 | 4 | 魅惑の橋子 | 100000 | 家具 |
|
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| 2 | 2 | げーたるど2000 500 ml | 370 | 飲料 |
|
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| 3 | 3 | 原始肉 | 2500 | 食品 |
|
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+-------------+---------+-----------------------+--------+---------------+
|
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4 rows in set (0.00 sec)
|
||||
|
||||
問題４
|
||||
SELECT *
|
||||
FROM items
|
||||
JOIN item_category USING (category_id)
|
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ORDER BY price ASC;
|
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+-------------+---------+-----------------------+--------+---------------+
|
||||
| category_id | item_id | name | price | category_name |
|
||||
+-------------+---------+-----------------------+--------+---------------+
|
||||
| 2 | 2 | げーたるど2000 500 ml | 370 | 飲料 |
|
||||
| 3 | 3 | 原始肉 | 2500 | 食品 |
|
||||
| 1 | 4 | 魅惑の橋子 | 100000 | 家具 |
|
||||
| 1 | 1 | ローマのテーブル | 150000 | 家具 |
|
||||
+-------------+---------+-----------------------+--------+---------------+
|
||||
4 rows in set (0.00 sec)
|
||||
|
||||
問題５
|
||||
SELECT * FROM items JOIN item_category USING (category_id) WHERE category_name = '家具';
|
||||
+-------------+---------+------------------+--------+---------------+
|
||||
| category_id | item_id | name | price | category_name |
|
||||
+-------------+---------+------------------+--------+---------------+
|
||||
| 1 | 1 | ローマのテーブル | 150000 | 家具 |
|
||||
| 1 | 4 | 魅惑の橋子 | 100000 | 家具 |
|
||||
+-------------+---------+------------------+--------+---------------+
|
||||
2 rows in set (0.00 sec)
|
||||
|
||||
問題 ６
|
||||
mysql> SELECT * FROM items JOIN item_category USING (category_id) WHERE price BETWEEN 1000 AND 50000;
|
||||
+-------------+---------+--------+-------+---------------+
|
||||
| category_id | item_id | name | price | category_name |
|
||||
+-------------+---------+--------+-------+---------------+
|
||||
| 3 | 3 | 原始肉 | 2500 | 食品 |
|
||||
+-------------+---------+--------+-------+---------------+
|
||||
1 row in set (0.00 sec)
|
||||
|
||||
問題７
|
||||
mysql> SELECT COUNT(*) AS total_items FROM items;
|
||||
+-------------+
|
||||
| total_items |
|
||||
+-------------+
|
||||
| 4 |
|
||||
+-------------+
|
||||
1 row in set (0.00 sec)
|
||||
|
||||
問題８
|
||||
mysql> SELECT * FROM items WHERE price = (SELECT MAX(price) FROM items);
|
||||
+---------+------------------+--------+-------------+
|
||||
| item_id | name | price | category_id |
|
||||
+---------+------------------+--------+-------------+
|
||||
| 1 | ローマのテーブル | 150000 | 1 |
|
||||
+---------+------------------+--------+-------------+
|
||||
1 row in set (0.00 sec)
|
||||
|
||||
問題９
|
||||
|
||||
|
||||
mysql> SELECT * FROM items WHERE name LIKE '%の%';
|
||||
+---------+------------------+--------+-------------+
|
||||
| item_id | name | price | category_id |
|
||||
+---------+------------------+--------+-------------+
|
||||
| 1 | ローマのテーブル | 150000 | 1 |
|
||||
| 4 | 魅惑の橋子 | 100000 | 1 |
|
||||
+---------+------------------+--------+-------------+
|
||||
2 rows in set (0.00 sec)
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
173
【練習問題】 SQL/Question2/item_category_清水.sql
Normal file
173
【練習問題】 SQL/Question2/item_category_清水.sql
Normal file
@@ -0,0 +1,173 @@
|
||||
mysql> CREATE TABLE item_category( category_id. INT PRIMARY KEY AUTO_INCREMENT, category_name VARCHAR(256) NOT NULL);
|
||||
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 '. INT PRIMARY KEY AUTO_INCREMENT, category_name VARCHAR(256) NOT NULL)' at line 1
|
||||
mysql> CREATE TABLE item_category ( category_id, INT PRIMARY KEY AUTO_INCREMENT, category_name VARCHAR(256) NOT NULL);
|
||||
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 ', INT PRIMARY KEY AUTO_INCREMENT, category_name VARCHAR(256) NOT NULL)' at line 1
|
||||
mysql> CREATE TABLE item_category ( category_id INT PRIMARY KEY AUTO_INCREMENT, category_name VARCHAR(256) NOT NULL);
|
||||
Query OK, 0 rows affected (0.03 sec)
|
||||
|
||||
mysql> DESC item_category;
|
||||
+---------------+--------------+------+-----+---------+----------------+
|
||||
| Field | Type | Null | Key | Default | Extra |
|
||||
+---------------+--------------+------+-----+---------+----------------+
|
||||
| category_id | int | NO | PRI | NULL | auto_increment |
|
||||
| category_name | varchar(256) | NO | | NULL | |
|
||||
+---------------+--------------+------+-----+---------+----------------+
|
||||
2 rows in set (0.02 sec)
|
||||
|
||||
mysql> SELECT * FROM item_category;
|
||||
Empty set (0.00 sec)
|
||||
|
||||
mysql> INSERT INTO item_category ( category_name ) VALUES ('家具'),('飲料'),('食品');
|
||||
Query OK, 3 rows affected (0.01 sec)
|
||||
Records: 3 Duplicates: 0 Warnings: 0
|
||||
|
||||
mysql> SELECT * FROM item_category;
|
||||
+-------------+---------------+
|
||||
| category_id | category_name |
|
||||
+-------------+---------------+
|
||||
| 1 | 家具 |
|
||||
| 2 | 飲料 |
|
||||
| 3 | 食品 |
|
||||
+-------------+---------------+
|
||||
3 rows in set (0.00 sec)
|
||||
|
||||
mysql> CREATE TABLE items ( item_id INT PRIMARY KEY AUTO_INCREMENT, name VARCHAR(256) NOT NULL,
|
||||
-> price INT NOT NULL, category_id INT, FOREIGN KEY ( categry_id) REFERENCES item_category(category_id));
|
||||
ERROR 1072 (42000): Key column 'categry_id' doesn't exist in table
|
||||
mysql> CREATE TABLE items ( item_id INT PRIMARY KEY AUTO_INCREMENT, name VARCHAR(256) NOT NULL,
|
||||
-> price INT NOT NULL, category_id INT, FOREIGN KEY ( categry_id ) REFERENCES item_category( category_id ));
|
||||
ERROR 1072 (42000): Key column 'categry_id' doesn't exist in table
|
||||
mysql> CREATE TABLE items ( item_id INT PRIMARY KEY AUTO_INCREMENT, name VARCHAR(256) NOT NULL,
|
||||
-> price INT NOT NULL, category_id INT, FOREIGN KEY ( category_id ) REFERENCES item_category( category_id ));
|
||||
Query OK, 0 rows affected (0.06 sec)
|
||||
|
||||
mysql> DESC items;
|
||||
+-------------+--------------+------+-----+---------+----------------+
|
||||
| Field | Type | Null | Key | Default | Extra |
|
||||
+-------------+--------------+------+-----+---------+----------------+
|
||||
| item_id | int | NO | PRI | NULL | auto_increment |
|
||||
| name | varchar(256) | NO | | NULL | |
|
||||
| price | int | NO | | NULL | |
|
||||
| category_id | int | YES | MUL | NULL | |
|
||||
+-------------+--------------+------+-----+---------+----------------+
|
||||
4 rows in set (0.00 sec)
|
||||
|
||||
mysql> INSERT INTO items ( name, price, category_id )
|
||||
-> VALUES ('ローマのテーブル', 150000, 1),('げーたるーど2000 500ml', 370, 2),('原始肉', 2500, 3),('魅惑の椅子', 100000, 1);
|
||||
Query OK, 4 rows affected (0.01 sec)
|
||||
Records: 4 Duplicates: 0 Warnings: 0
|
||||
|
||||
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 |
|
||||
+---------+------------------------+--------+-------------+
|
||||
4 rows in set (0.00 sec)
|
||||
|
||||
mysql> SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
|
||||
-> FROM items JOIN item_category 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 |
|
||||
| 2 | 2 | げーたるーど2000 500ml | 370 | 飲料 |
|
||||
| 3 | 3 | 原始肉 | 2500 | 食品 |
|
||||
+-------------+---------+------------------------+--------+---------------+
|
||||
4 rows in set (0.00 sec)
|
||||
|
||||
mysql> SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
|
||||
-> FROM items JOIN item_category ON items.category_id = item_category.category_id
|
||||
-> ORDER BY items.price ASC;
|
||||
+-------------+---------+------------------------+--------+---------------+
|
||||
| category_id | item_id | name | price | category_name |
|
||||
+-------------+---------+------------------------+--------+---------------+
|
||||
| 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 | 1 | ローマのテーブル | 150000 | 家具 |
|
||||
+-------------+---------+------------------------+--------+---------------+
|
||||
4 rows in set (0.00 sec)
|
||||
|
||||
mysql> SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
|
||||
-> FROM items JOIN item_category 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 |
|
||||
| 2 | 2 | げーたるーど2000 500ml | 370 | 飲料 |
|
||||
| 3 | 3 | 原始肉 | 2500 | 食品 |
|
||||
+-------------+---------+------------------------+--------+---------------+
|
||||
4 rows in set (0.00 sec)
|
||||
|
||||
mysql> SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
|
||||
-> FROM items JOIN item_category ON items.category_id = item_category.category_id
|
||||
-> ORDER BY items.price ASC;
|
||||
+-------------+---------+------------------------+--------+---------------+
|
||||
| category_id | item_id | name | price | category_name |
|
||||
+-------------+---------+------------------------+--------+---------------+
|
||||
| 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 | 1 | ローマのテーブル | 150000 | 家具 |
|
||||
+-------------+---------+------------------------+--------+---------------+
|
||||
4 rows in set (0.00 sec)
|
||||
|
||||
mysql> SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
|
||||
-> FROM items JOIN item_category ON items.category_id = item_category.category_id
|
||||
-> WHERE item_category.category_name = '家具';
|
||||
+-------------+---------+------------------+--------+---------------+
|
||||
| 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 |
|
||||
+-------------+---------+------------------+--------+---------------+
|
||||
2 rows in set (0.00 sec)
|
||||
|
||||
mysql> SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
|
||||
-> FROM items JOIN item_category ON items.category_id = item_category.category_id
|
||||
-> WHERE items.price BETWEEN 1000 AND 50000;
|
||||
+-------------+---------+--------+-------+---------------+
|
||||
| category_id | item_id | name | price | category_name |
|
||||
+-------------+---------+--------+-------+---------------+
|
||||
| 3 | 3 | 原始肉 | 2500 | 食品 |
|
||||
+-------------+---------+--------+-------+---------------+
|
||||
1 row in set (0.00 sec)
|
||||
|
||||
mysql> SELECT COUNT (*) AS data_count FROM items;
|
||||
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 '*) AS data_count FROM items' at line 1
|
||||
mysql> SELECT COUNT(*) AS data_count FROM items;
|
||||
+------------+
|
||||
| data_count |
|
||||
+------------+
|
||||
| 4 |
|
||||
+------------+
|
||||
1 row in set (0.01 sec)
|
||||
|
||||
mysql> SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
|
||||
-> FROM items JOIN item_category ON items.category_id = item_category.category_id
|
||||
-> WHERE items.price = ( SELECT MAX(price) FROM items );
|
||||
+-------------+---------+------------------+--------+---------------+
|
||||
| category_id | item_id | name | price | category_name |
|
||||
+-------------+---------+------------------+--------+---------------+
|
||||
| 1 | 1 | ローマのテーブル | 150000 | 家具 |
|
||||
+-------------+---------+------------------+--------+---------------+
|
||||
1 row in set (0.00 sec)
|
||||
|
||||
mysql> SELECT items.category_id, items.item_id, items.name, items.price, item_category.category_name
|
||||
-> FROM items JOIN item_category ON items.category_id = item_category.category_id
|
||||
-> WHERE items.name LIKE '%の%';
|
||||
+-------------+---------+------------------+--------+---------------+
|
||||
| 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 |
|
||||
+-------------+---------+------------------+--------+---------------+
|
||||
2 rows in set (0.00 sec)
|
||||
|
||||
mysql>
|
||||
Binary file not shown.
Reference in New Issue
Block a user