MySQL操作：添加数据，修改数据，删除数据

1 添加数据

格式： insert into 表名[(字段列表)] values(值列表...);

--标准添加（指定所有字段，给定所有的值）
mysql> insert into stu(id,name,age,sex,classid) values(1,'zhangsan',20,'m','lamp138');
Query OK, 1 row affected (0.13 sec)

mysql>
--指定部分字段添加值
mysql> insert into stu(name,classid) value('lisi','lamp138');
Query OK, 1 row affected (0.11 sec)

-- 不指定字段添加值
mysql> insert into stu value(null,'wangwu',21,'w','lamp138');
Query OK, 1 row affected (0.22 sec)

-- 批量添加值
mysql> insert into stu values
    -> (null,'zhaoliu',25,'w','lamp94'),
    -> (null,'uu01',26,'m','lamp94'),
    -> (null,'uu02',28,'w','lamp92'),
    -> (null,'qq02',24,'m','lamp92'),
    -> (null,'uu03',32,'m','lamp138'),
    -> (null,'qq03',23,'w','lamp94'),
    -> (null,'aa',19,'m','lamp138');
Query OK, 7 rows affected (0.27 sec)
Records: 7  Duplicates: 0  Warnings: 0

2 修改数据

格式：update 表名 set 字段1=值1,字段2=值2,字段n=值n... where 条件

-- 将id为11的age改为35，sex改为m值
mysql> update stu set age=35,sex='m' where id=11;
Query OK, 1 row affected (0.16 sec)
Rows matched: 1  Changed: 1  Warnings: 0

-- 将id值为12和14的数据值sex改为m，classid改为lamp92
mysql> update stu set sex='m',classid='lamp92' where id=12 or id=14 --等价于下面
mysql> update stu set sex='m',classid='lamp92' where id in(12,14);
Query OK, 2 rows affected (0.09 sec)
Rows matched: 2  Changed: 2  Warnings: 0

3 删除数据

-- 删除stu表中id值为100的数据
mysql> delete from stu where id=100;
Query OK, 0 rows affected (0.00 sec)

-- 删除stu表中id值为20到30的数据
mysql> delete from stu where id>=20 and id<=30;
Query OK, 0 rows affected (0.00 sec)

-- 删除stu表中id值为20到30的数据（等级于上面写法）
mysql> delete from stu where id between 20 and 30;
Query OK, 0 rows affected (0.00 sec)

-- 删除stu表中id值大于200的数据
mysql> delete from stu where id>200;
Query OK, 0 rows affected (0.00 sec)