MySQL授权问题总结

MySQL授权问题总结授权问题总结

MySQL授权问题总结

我用localhost的root帐号不能连 最后请教DBA组新建用户搞定！

现弄些受权用户的资料 以备不时之需

授权表使用举例

grant用于给增加用户和创建权限，revoke用于删除用户权限。

下面是一些用grant增加用户和创建权限的例子：

mysql> grant all privileges on *.* to test@localhost identified by 'test' with grant option;

values("localhost","test",password("test"),"Y","Y","Y","Y","Y","Y","Y","Y","Y","Y","Y","Y","Y","Y");

mysql> flush privileges;

这两句和上面第一句grant的效果是一样的，也是增加了一个本地的test超级用户。我们看到用grant方便多了，而且还不需flush privileges。

mysql> insert into user (host,user,password) values("192.168.1.0/255.255.255.0","test1",PASSWORD("test")); mysql> insert into db values("192.168.1.0/255.255.255.0","test","test1","Y","Y","Y","Y","Y","Y","N","N","N","N") mysql> flush privileges;

这三句和上面第二句grant的效果也是一样的，也是增加了一个只能从C类子网192.168.1连接，对test库有select,insert,update,delete,create,drop操作权限的test1用户，口令是test。要取消一个用户的权

限，使用revoke语句。revoke的语法非常类似于grant语句，除了to用from取代并且没有identified by和with grant option子句，下面是用revoke删除用户权限的例子：

mysql> revoke all on test.* from test1@'192.168.1.0/255.255.255.0';

这句revoke就撤消了上面第二句grant创建的权限，但是test1用户并没有被删除，必须手工从user表删除：

mysql> delete from user where user='test1';

mysql> flush privileges;