創建用戶并先定local訪問，密碼123
CREATE USER yy@localhost IDENTIFIED BY '123';

創建用戶不限制登錄
CREATE USER yy IDENTIFIED BY '123';

授權用戶
GRANT ALL PRIVILEGES ON *.* TO user;@localhost
grant select,insert,update,delete on *.* to test1@"%" Identified by "abc";
格式：grant select on 數據庫.* to 用戶名@登錄主機 identified by “密碼”

修改密碼
grant all privileges on pureftpd.* to koko@localhost identified by 'mimi';

查看用戶信息
select host,user from mysql.user;

刪除用戶
Delete FROM user Where User='test' and Host='localhost';

刷新權限
flush privileges;