1.管理用户
1.添加用户
-- 创建用户
CREATE USER '用户名'@'主机名'IDENTIFIED BY '密码';
2.删除用户
DROP USER '用户名'@'主机名';
3.修改用户
-- 修改密码
UPDATE USER SET PASSWORD = PASSWORD('新密码')WHERE USER = '用户名';
SET PASSWORD FOR '用户名'@'主机名' = PASSWORD ('新密码');
4.查询用户
-- 切换到MySQL数据库
USE mysql;
-- 查询user表
SELECT *FROM USER;
2.权限授予
1.查询权限
SHOW GRANTS FOR 'root'@'localhost';
2.授予权限
GRANT SELECT,DELETE,UPDATE ON `db3`.`mytable` TO 'root'@'localhost';
GRANT ALL ON `db3`.`mytable` TO 'root'@'localhost';
3.撤销权限
REVOKE UPDATE ON `db3`.`mytable` FROM 'root'@'localhost';