mysql> create table new_department like department;
Query OK, 0 rows affected (0.09 sec)

mysql> insert into new_department select*from department;
Query OK, 3 rows affected (0.02 sec)
Records: 3  Duplicates: 0  Warnings: 0

mysql> insert into new_department values('D004','営業部','12');
Query OK, 1 row affected (0.01 sec)

mysql> insert into new_department(dep_id,name,floor)
    -> values('D005','経理部','8');
Query OK, 1 row affected (0.01 sec)

mysql> update new_employee set name ='山田太郎'
    -> where emp_id ='E00001';
Query OK, 0 rows affected (0.00 sec)
Rows matched: 1  Changed: 0  Warnings: 0

mysql> select*from new_employee where emp_id ='E00001';
+--------+--------------+--------+------------+--------+--------+
| emp_id | name         | gender | birthday   | salary | dep_id |
+--------+--------------+--------+------------+--------+--------+
| E00001 | 山田太郎     | 男     | 1995-01-01 |   NULL | NULL   |
+--------+--------------+--------+------------+--------+--------+
1 row in set (0.00 sec)

mysql> update new_employee set salary = salary*0.7
    -> where gender ='女';
Query OK, 3 rows affected (0.01 sec)
Rows matched: 3  Changed: 3  Warnings: 0

mysql> select name,gender,salary from new_empolyee;
ERROR 1146 (42S02): Table 'practice.new_empolyee' doesn't exist
mysql> select name, gender, salary from new_employee;
+--------------+--------+--------+
| name         | gender | salary |
+--------------+--------+--------+
| 山田太郎     | 男     |   NULL |
| 佐藤次郎     | 男     | 250000 |
| 鈴木花子     | 女     | 175000 |
| 田中三郎     | 男     | 400000 |
| 高橋良子     | 女     | 210000 |
| 鈴木良枝     | 女     | 315000 |
| 佐藤健次     | 男     | 350000 |
+--------------+--------+--------+
7 rows in set (0.00 sec)