mysql服务管理
查看服务状态
systemctl status mysqld.service
启动服务
systemctl start mysqld.service
关闭服务
systemctl stop mysqld.service
用户权限管理
创建用户
create user 'sgf'@'%' identified by 'SGF_lll315';
查询用户
select user,host from mysql.user;
删除用户
drop user sgf@'%';
给用户授权
grant create,alter,drop,select,insert,update,delete on testdb.* to sgf@'%';
刷新权限
flush privileges;
查看权限
show grants for sgf;