MySQL学习的表单定义

mysql> select database();
+-------------+
| database()  |
+-------------+
| myemployees |
+-------------+
1 row in set (0.00 sec)


mysql> show tables;
+-----------------------+
| Tables_in_myemployees |
+-----------------------+
| departments           |
| employees             |
| job_grades            |
| jobs                  |
| locations             |
+-----------------------+
5 rows in set (0.00 sec)

mysql> desc departments;
+-----------------+------------+------+-----+---------+----------------+
| Field           | Type       | Null | Key | Default | Extra          |
+-----------------+------------+------+-----+---------+----------------+
| department_id   | int(4)     | NO   | PRI | NULL    | auto_increment |
| department_name | varchar(3) | YES  |     | NULL    |                |
| manager_id      | int(6)     | YES  |     | NULL    |                |
| location_id     | int(4)     | YES  | MUL | NULL    |                |
+-----------------+------------+------+-----+---------+----------------+
4 rows in set (0.00 sec)

mysql> desc employees;
+----------------+--------------+------+-----+---------+----------------+
| Field          | Type         | Null | Key | Default | Extra          |
+----------------+--------------+------+-----+---------+----------------+
| employee_id    | int(6)       | NO   | PRI | NULL    | auto_increment |
| first_name     | varchar(20)  | YES  |     | NULL    |                |
| last_name      | varchar(25)  | YES  |     | NULL    |                |
| email          | varchar(25)  | YES  |     | NULL    |                |
| phone_number   | varchar(20)  | YES  |     | NULL    |                |
| job_id         | varchar(10)  | YES  | MUL | NULL    |                |
| salary         | double(10,2) | YES  |     | NULL    |                |
| commission_pct | double(4,2)  | YES  |     | NULL    |                |
| manager_id     | int(6)       | YES  |     | NULL    |                |
| department_id  | int(4)       | YES  | MUL | NULL    |                |
| hiredate       | datetime     | YES  |     | NULL    |                |
+----------------+--------------+------+-----+---------+----------------+
11 rows in set (0.00 sec)

mysql> desc job_grades;
+-------------+------------+------+-----+---------+-------+
| Field       | Type       | Null | Key | Default | Extra |
+-------------+------------+------+-----+---------+-------+
| grade_level | varchar(3) | YES  |     | NULL    |       |
| lowest_sal  | int(11)    | YES  |     | NULL    |       |
| highest_sal | int(11)    | YES  |     | NULL    |       |
+-------------+------------+------+-----+---------+-------+
3 rows in set (0.00 sec)

mysql> desc jobs;
+------------+-------------+------+-----+---------+-------+
| Field      | Type        | Null | Key | Default | Extra |
+------------+-------------+------+-----+---------+-------+
| job_id     | varchar(10) | NO   | PRI | NULL    |       |
| job_title  | varchar(35) | YES  |     | NULL    |       |
| min_salary | int(6)      | YES  |     | NULL    |       |
| max_salary | int(6)      | YES  |     | NULL    |       |
+------------+-------------+------+-----+---------+-------+
4 rows in set (0.00 sec)

mysql> desc locations;
+----------------+-------------+------+-----+---------+----------------+
| Field          | Type        | Null | Key | Default | Extra          |
+----------------+-------------+------+-----+---------+----------------+
| location_id    | int(11)     | NO   | PRI | NULL    | auto_increment |
| street_address | varchar(40) | YES  |     | NULL    |                |
| postal_code    | varchar(12) | YES  |     | NULL    |                |
| city           | varchar(30) | YES  |     | NULL    |                |
| state_province | varchar(25) | YES  |     | NULL    |                |
| country_id     | varchar(2)  | YES  |     | NULL    |                |
+----------------+-------------+------+-----+---------+----------------+
6 rows in set (0.00 sec)

mysql> select database();
+------------+
| database() |
+------------+
| girls      |
+------------+
1 row in set (0.00 sec)

mysql> show tables;
+-----------------+
| Tables_in_girls |
+-----------------+
| admin           |
| beauty          |
| boys            |
+-----------------+
3 rows in set (0.00 sec)

mysql> desc admin;
+----------+-------------+------+-----+---------+----------------+
| Field    | Type        | Null | Key | Default | Extra          |
+----------+-------------+------+-----+---------+----------------+
| id       | int(11)     | NO   | PRI | NULL    | auto_increment |
| username | varchar(10) | NO   |     | NULL    |                |
| password | varchar(10) | NO   |     | NULL    |                |
+----------+-------------+------+-----+---------+----------------+
3 rows in set (0.00 sec)

mysql> desc beauty;
+--------------+-------------+------+-----+---------------------+----------------+
| Field        | Type        | Null | Key | Default             | Extra          |
+--------------+-------------+------+-----+---------------------+----------------+
| id           | int(11)     | NO   | PRI | NULL                | auto_increment |
| name         | varchar(50) | NO   |     | NULL                |                |
| sex          | char(1)     | YES  |     | 女                  |                |
| borndate     | datetime    | YES  |     | 1987-01-01 00:00:00 |                |
| phone        | varchar(11) | NO   |     | NULL                |                |
| photo        | blob        | YES  |     | NULL                |                |
| boyfriend_id | int(11)     | YES  |     | NULL                |                |
+--------------+-------------+------+-----+---------------------+----------------+
7 rows in set (0.00 sec)

mysql> desc boys;
+---------+-------------+------+-----+---------+----------------+
| Field   | Type        | Null | Key | Default | Extra          |
+---------+-------------+------+-----+---------+----------------+
| id      | int(11)     | NO   | PRI | NULL    | auto_increment |
| boyName | varchar(20) | YES  |     | NULL    |                |
| userCP  | int(11)     | YES  |     | NULL    |                |
+---------+-------------+------+-----+---------+----------------+
3 rows in set (0.00 sec)