mysql数据操作

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)

 insert into stu(id,name,age,sex,classid) values(1,'zhangsan',20,'m','lamp138');
Query OK, 1 row affected (0.13 sec)


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

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

-- 批量添加值
 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
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
 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
 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
删除数据

格式:delete from 表名 [where 条件]

-- 删除stu表中id值为100的数据
 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
 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)
 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
 delete from stu where id>200;
Query OK, 0 rows affected (0.00 sec)

posted @ 2017-12-12 17:48  miaomf  阅读(105)  评论(0编辑  收藏  举报