Question1です
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146
【練習問題】 SQL/Question1/Quetion1.sql
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146
【練習問題】 SQL/Question1/Quetion1.sql
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mysql> ALTER TABLE book_table MODIFY COLUMN book_id INT COMMENT '書籍ID';
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Query OK, 0 rows affected (0.01 sec)
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Records: 0 Duplicates: 0 Warnings: 0
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mysql> ALTER TABLE book_table MODIFY COLUMN book_name VARCHAR(50) COMMENT '書籍名';
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Query OK, 0 rows affected (0.01 sec)
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Records: 0 Duplicates: 0 Warnings: 0
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mysql> ALTER TABLE book_table MODIFY COLUMN author_name VARCHAR(50) COMMENT '著者';
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Query OK, 0 rows affected (0.01 sec)
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Records: 0 Duplicates: 0 Warnings: 0
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mysql> ALTER TABLE book_table MODIFY COLUMN price INT COMMENT '価格';
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Query OK, 0 rows affected (0.04 sec)
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Records: 0 Duplicates: 0 Warnings: 0
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mysql> ALTER TABLE book_table MODIFY COLUMN sales_flag INT COMMENT '販売有無';
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Query OK, 0 rows affected (0.01 sec)
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Records: 0 Duplicates: 0 Warnings: 0
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mysql> INSERT INTO book_table VALUES(10001, TwoPeace, 三田英一郎, 420, 1);
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ERROR 1054 (42S22): Unknown column 'TwoPeace' in 'field list'
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mysql> INSERT INTO book_table VALUES(10001, 'TwoPeace', '三田英一郎', 420, 1);
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Query OK, 1 row affected (0.00 sec)
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mysql> INSERT INTO book_table VALUES(10002, '名探偵金田二', '青山ふみや', 460, 1);
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Query OK, 1 row affected (0.00 sec)
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mysql> INSERT INTO book_table VALUES(10003, '坊ちゃま', '冬目漱岩', 460, 1);
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Query OK, 1 row affected (0.00 sec)
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mysql> UPDATE book_table SET book_id = 20001 WHERE 10003;
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Query OK, 3 rows affected (0.01 sec)
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Rows matched: 3 Changed: 3 Warnings: 0
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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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| 20001 | TwoPeace | 三田英一郎 | 420 | 1 |
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| 20001 | 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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+---------+--------------+-------------+-------+------------+
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3 rows in set (0.00 sec)
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mysql> UPDATE book_table SET book_id = 10001 WHERE price = 420;
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Query OK, 1 row affected (0.00 sec)
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Rows matched: 1 Changed: 1 Warnings: 0
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mysql> UPDATE book_table SET book_id = 10002 WHERE author_name = '青山ふみや';
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Query OK, 1 row affected (0.00 sec)
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Rows matched: 1 Changed: 1 Warnings: 0
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mysql> ^C
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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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| 20001 | 坊ちゃま | 冬目漱岩 | 460 | 1 |
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+---------+--------------+-------------+-------+------------+
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3 rows in set (0.00 sec)
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mysql> INSERT INTO book_table VALUES(30001, '西方見聞録', '不明', 1000, 1);
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Query OK, 1 row affected (0.00 sec)
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mysql> INSERT INTO book_table VALUES(40010, '吾輩は犬である', '冬目漱岩', 420, 1);
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Query OK, 1 row affected (0.00 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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| 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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+---------+----------------+-------------+-------+------------+
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5 rows in set (0.00 sec)
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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＝ポロ' WHERE book_id = 30001;
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Query OK, 1 row affected (0.00 sec)
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Rows matched: 1 Changed: 1 Warnings: 0
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mysql> UPDATE book_table SET 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;
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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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| 30001 | 西方見聞録 | マール＝コー＝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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5 rows in set (0.00 sec)
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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_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 (0.00 sec)
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mysql> DELETE FROM book_table where book_id = 20001;
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Query OK, 1 row affected (0.00 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＝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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