MySQL在表中加入记录

（1）创建teacher表

 mysql> create table teacher
      -> (
      -> Id int (5) auto_increment not null primary key,
      -> name char(10) not null, 
      -> address varchar(50) default 'No.1 Mid school',
      -> year date
      -> );
  Query OK, 0 rows affected (0.02 sec)
  
  mysql> show tables;
  +------------------+
  | Tables_in_school |
  +------------------+
  | teacher          |
  +------------------+
  1 row in set (0.00 sec)

（2）显示表的结构

mysql> desc teacher;
+---------+-------------+------+-----+-----------------+----------------+
| Field   | Type        | Null | Key | Default         | Extra          |
+---------+-------------+------+-----+-----------------+----------------+
| Id      | int(5)      | NO   | PRI | NULL            | auto_increment |
| name    | char(10)    | NO   |     | NULL            |                |
| address | varchar(50) | YES  |     | No.1 Mid school |                |
| year    | date        | YES  |     | NULL            |                |
+---------+-------------+------+-----+-----------------+----------------+
4 rows in set (0.00 sec)

（3）开始仅仅创建一张空表，无内容，所以显示为空

  mysql> select * from teacher;
  Empty set (0.00 sec)
  
  mysql> show tables;
  +------------------+
  | Tables_in_school |
  +------------------+
  | teacher          |
  +------------------+
  1 row in set (0.00 sec)

（4）插入相关记录

  mysql> insert into teacher
      -> values (202, 'robot', 'ZhuHai', '2013-04-24');
  Query OK, 1 row affected (0.01 sec)

（5）插入NULL值

mysql> insert into teacher values(203, 'Rose', 'ZhuHai', NULL);
Query OK, 1 row affected (0.05 sec)

mysql> select * from teacher;
+-----+-------+---------+------------+
| Id  | name  | address | year       |
+-----+-------+---------+------------+
| 202 | robot | ZhuHai  | 2013-04-24 |
| 203 | Rose  | ZhuHai  | NULL       |
+-----+-------+---------+------------+
2 rows in set (0.00 sec)

mysql>

（6）输出了所有字段的信息

  mysql> select * from teacher;
  +-----+-------+---------+------------+
  | Id  | name  | address | year       |
  +-----+-------+---------+------------+
  | 202 | robot | ZhuHai  | 2013-04-24 |
  +-----+-------+---------+------------+
  1 row in set (0.00 sec)
  
  mysql>