查询所有用户（mysql库下）
select * from user;
创建一个新用户
CREATE USER \'zhong\'@\'localhost\' IDENTIFIED BY \'123456\'; //只允许本地登录 CREATE USER \'zhong\'@\'%\' IDENTIFIED BY \'123456\'; //允许所有ip登录
指定部分权限（数据库zhong_base的所有表，分配Select,Update,Insert,Delete权限）
grant Select,Update,Insert,Delete on zhong_base.* to \'zhong\'@\'%\' identified by \'123456\';
flush privileges;
指定所有权限
grant all privileges on zhong_base.* to \'zhong\'@\'%\' identified by \'123456\';
flush privileges;
取消用户权限（取消用户的Update,Insert,Delete权限）
revoke Update,Insert,Delete on zhong.* from \'zhong\'@\'%\';
查看该用户的权限
show grants for \'zhong\'@\'%\'
删除用户
delete from user where user=\'zhong\' and host=\'%\'; flush privileges;
删除用户及权限
drop user \'zhong\'@\'%\';
修改密码
set password for \'zhong\'@\'localhost\'=password(\'123456\');