(1)
mysql> create table new_department like department;
Query OK, 0 rows affected (0.17 sec)

mysql> insert into new_department
    -> select * from department;
Query OK, 3 rows affected (0.05 sec)


(2)
mysql> insert into new_department
    -> values('D004', '営業部', '12');
Query OK, 1 row affected (0.01 sec)

mysql> select * from new_department;
+--------+----------------+-------+
| dep_id | name           | floor |
+--------+----------------+-------+
| D001   | 総務部         |     8 |
| D002   | 人材開発部     |     8 |
| D003   | システム開発部 |    12 |
| D004   | 営業部         |    12 |
+--------+----------------+-------+
4 rows in set (0.00 sec)


(3)
mysql> insert into new_department(dep_id, name, floor)
    -> values('D005', '経理部', 8);
Query OK, 1 row affected (0.00 sec)

mysql> select * from new_department;
+--------+----------------+-------+
| dep_id | name           | floor |
+--------+----------------+-------+
| D001   | 総務部         |     8 |
| D002   | 人材開発部     |     8 |
| D003   | システム開発部 |    12 |
| D004   | 営業部         |    12 |
| D005   | 経理部         |     8 |
+--------+--------------


(4)
mysql> update new_employee set name = '山田太郎' where emp_id = 'E00001';
Query OK, 0 rows affected (0.09 sec)

mysql> select * from new_employee;
+--------+----------+--------+------------+--------+--------+
| emp_id | name     | gender | birthday   | salary | dep_id |
+--------+----------+--------+------------+--------+--------+
| E00001 | 山田太郎 | 男     | 1995-01-01 |   NULL | NULL   |
| E00002 | 佐藤次郎 | 男     | 1995-05-03 | 250000 | D001   |
| E00003 | 鈴木花子 | 女     | 1990-02-11 | 250000 | D002   |
| E00004 | 田中三郎 | 男     | 1975-11-03 | 400000 | D003   |
| E00005 | 高橋良子 | 女     | 1985-11-23 | 300000 | D003   |
| E00006 | 鈴木良枝 | 女     | 1970-05-03 | 450000 | D003   |
| E00007 | 佐藤健次 | 男     | 1980-05-05 | 350000 | D001   |
+--------+----------+--------+------------+--------+--------+
7 rows in set (0.00 sec)


(5)
mysql> update new_employee set salary=salary*0.7
    -> where gender='女';
Query OK, 3 rows affected (0.00 sec)

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)