1.创建用户

CREATE USER 'dingyingsi'@'localhost' IDENTIFIED BY 'dys123'; //将该用户创建在本机上CREATE USER 'dingyingsi'@'%' IDENTIFIED BY 'dys123';　　//创建的用户可以远程连接本机

2.授权

grant select,insert,update,delete,create,drop on dys.tb1 to 'dingyingsi'@'localhost';grant all privileges on dys.tb1 to 'dingyingsi'@'localhost'; grant all privileges on *.* to 'dingyingsi'@'localhost';

3.查看授权

SHOW GRANTS FOR 'dingyingsi'@'localhost'

4.撤销权限

revoke all privileges on *.* from 'dingyingsi'@"%";  revoke all on db1.tb1 from 'dingyingsi'@"%";  revoke all on db1.* from 'dingyingsi'@"%";