• 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)

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  • 原文地址:https://www.cnblogs.com/mmf1/p/8028980.html
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