mysql> CREATE TABLE book_table (
    -> book_id INT,
    -> book_name VARCHAR(50),
    -> author_name VARCHAR(50),
    -> price INT,
    -> sales_flag INT
    -> );
Query OK, 0 rows affected (0.03 sec)

mysql> INSERT INTO book_table VALUES (10001, 'TwoPeace', '三田栄一郎', 420, 1);
Query OK, 1 row affected (0.02 sec)

mysql> INSERT INTO book_table VALUES (10002, '名探偵金田二', '青山ふみや', 460, 1);
Query OK, 1 row affected (0.01 sec)

mysql> INSERT INTO book_table VALUES (20001, '坊ちゃま', '冬目漱岩', 460, 1);
Query OK, 1 row affected (0.01 sec)

mysql> INSERT INTO book_table VALUES (30001, '西方見聞録', '不明', 1000, 1);
Query OK, 1 row affected (0.01 sec)

mysql> INSERT INTO book_table VALUES (40010, '吾輩は犬である', '冬目漱岩', 420, 1);
Query OK, 1 row affected (0.00 sec)

mysql> SELECT * FROM book_table;
+---------+----------------+-------------+-------+------------+
| book_id | book_name      | author_name | price | sales_flag |
+---------+----------------+-------------+-------+------------+
|   10001 | TwoPeace       | 三田栄一郎  |   420 |          1 |
|   10002 | 名探偵金田二   | 青山ふみや  |   460 |          1 |
|   20001 | 坊ちゃま       | 冬目漱岩    |   460 |          1 |
|   30001 | 西方見聞録     | 不明        |  1000 |          1 |
|   40010 | 吾輩は犬である | 冬目漱岩    |   420 |          1 |
+---------+----------------+-------------+-------+------------+
5 rows in set (0.00 sec)

mysql> SELECT book_name , author_name FROM book_table;
+----------------+-------------+
| book_name      | author_name |
+----------------+-------------+
| TwoPeace       | 三田栄一郎  |
| 名探偵金田二   | 青山ふみや  |
| 坊ちゃま       | 冬目漱岩    |
| 西方見聞録     | 不明        |
| 吾輩は犬である | 冬目漱岩    |
+----------------+-------------+
5 rows in set (0.00 sec)

mysql> SELECT * FROM book_table;
+---------+----------------+-------------+-------+------------+
| book_id | book_name      | author_name | price | sales_flag |
+---------+----------------+-------------+-------+------------+
|   10001 | TwoPeace       | 三田栄一郎  |   420 |          1 |
|   10002 | 名探偵金田二   | 青山ふみや  |   460 |          1 |
|   20001 | 坊ちゃま       | 冬目漱岩    |   460 |          1 |
|   30001 | 西方見聞録     | 不明        |  1000 |          0 |
|   40010 | 吾輩は犬である | 冬目漱岩    |   420 |          1 |
+---------+----------------+-------------+-------+------------+
5 rows in set (0.00 sec)

mysql> SELECT * FROM book_table WHERE sales_flag = 1;
+---------+----------------+-------------+-------+------------+
| book_id | book_name      | author_name | price | sales_flag |
+---------+----------------+-------------+-------+------------+
|   10001 | TwoPeace       | 三田栄一郎  |   420 |          1 |
|   10002 | 名探偵金田二   | 青山ふみや  |   460 |          1 |
|   20001 | 坊ちゃま       | 冬目漱岩    |   460 |          1 |
|   40010 | 吾輩は犬である | 冬目漱岩    |   420 |          1 |
+---------+----------------+-------------+-------+------------+
4 rows in set (0.00 sec)

mysql> SELECT * FROM book_table WHERE author_name = '冬目漱岩' AND price = 420;
+---------+----------------+-------------+-------+------------+
| book_id | book_name      | author_name | price | sales_flag |
+---------+----------------+-------------+-------+------------+
|   40010 | 吾輩は犬である | 冬目漱岩    |   420 |          1 |
+---------+----------------+-------------+-------+------------+
1 row in set (0.00 sec)

mysql> SELECT * FROM book_table;
+---------+----------------+-------------+-------+------------+
| book_id | book_name      | author_name | price | sales_flag |
+---------+----------------+-------------+-------+------------+
|   10001 | TwoPeace       | 三田栄一郎  |   420 |          1 |
|   10002 | 名探偵金田二   | 青山ふみや  |   460 |          1 |
|   30001 | 西方見聞録     | 不明        |  1000 |          0 |
|   40010 | 吾輩は犬である | 冬目漱岩    |   420 |          1 |
+---------+----------------+-------------+-------+------------+
4 rows in set (0.00 sec)

mysql> UPDATE book_table SET author_name = 'マール＝コー＝ポロ' WHERE book_id = 30001;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> SELECT * FROM book_table;
+---------+----------------+--------------------+-------+------------+
| book_id | book_name      | author_name        | price | sales_flag |
+---------+----------------+--------------------+-------+------------+
|   10001 | TwoPeace       | 三田栄一郎         |   420 |          1 |
|   10002 | 名探偵金田二   | 青山ふみや         |   460 |          1 |
|   30001 | 西方見聞録     | マール＝コー＝ポロ |  1000 |          0 |
|   40010 | 吾輩は犬である | 冬目漱岩           |   420 |          1 |
+---------+----------------+--------------------+-------+------------+
4 rows in set (0.00 sec)