mysql中dcl语句介绍

1　创建用户

CREATE USER 用户名@地址 IDENTIFIED BY '密码';
CREATE USER [email protected] IDENTIFIED BY ‘’; 
CREATE USER user2@’%’ IDENTIFIED BY ‘’; 
           

2　给用户授权

GRANT 权限, … , 权限n ON 数据库.* TO 用户名@IP
GRANT CREATE,ALTER,DROP,INSERT,UPDATE,DELETE,SELECT ON mydb1.* TO [email protected];
GRANT ALL ON mydb1.* TO user2@’%’;
           

3　撤销授权

REVOKE权限1, … , 权限n ON 数据库.* FORM 用户名
REVOKE CREATE,ALTER,DROP ON mydb1.* FROM [email protected];
           

4　查看用户权限

SHOW GRANTS FOR [email protected];```
           

5　删除用DROP USER 用户名

DROP USER [email protected];

6　修改用户密码

Use mysql;
UPDATE USER SET PASSWORD=PASSWORD(‘密码’) WHERE User=’用户名’;
FLUSH PRIVILEGES;
UPDATE USER SET PASSWORD=PASSWORD('1234') WHERE User='user2';
FLUSH PRIVILEGES;