第五节 添加字段之insert into

Posted 2020-11-27 kogmaw

 1 ‘‘‘
 2 t_student表结构
 3 +--------+------------------------+------+-----+---------+----------------+
 4 | Field  | Type                   | Null | Key | Default | Extra          |
 5 +--------+------------------------+------+-----+---------+----------------+
 6 | id     | int(10) unsigned       | NO   | PRI | NULL    | auto_increment |
 7 | name   | varchar(30)            | YES  |     | NULL    |                |
 8 | age    | tinyint(3) unsigned    | YES  |     | 0       |                |
 9 | gender | enum(‘男‘,‘女‘,‘保密‘) | YES  |     | 保密    |                |
10 | cls_id | int(10) unsigned       | YES  |     | NULL    |                |
11 | birth  | date                   | YES  |     | NULL    |                |
12 +--------+------------------------+------+-----+---------+----------------+
13 ‘‘‘
14 -- 每个字段都插入数据
15 -- auto_increment可以用0，null，default表示，不能不写
16 -- enum(‘男‘,‘女‘,‘保密‘)可以用数据1,2,3对应表示
17 INSERT INTO t_student VALUES(0,‘小李飞刀‘,20,‘女‘,1,‘1990-1-1‘);
18 INSERT INTO t_student VALUES(null,‘小李飞刀‘,20,‘女‘,1,‘1990-1-1‘);
19 INSERT INTO t_student VALUES(default,‘小李飞刀‘,20,‘女‘,1,‘1990-1-1‘);
20 
21 -- 指定列添加数据
22 INSERT INTO t_student (name,gender)  VALUES(‘小法1‘,1),(‘小法2‘,1);