1　创建用户

CREATE USER 用户名@地址 IDENTIFIED BY '密码';CREATE USER user1@localhost IDENTIFIED BY ‘123’; CREATE USER user2@’%’ IDENTIFIED BY ‘123’; 

2　给用户授权

GRANT 权限1, … , 权限n ON 数据库.* TO 用户名@IPGRANT CREATE,ALTER,DROP,INSERT,UPDATE,DELETE,SELECT ON mydb1.* TO user1@localhost;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 user1@localhost;

4　查看用户权限

SHOW GRANTS FOR user1@localhost;```

5　删除用DROP USER 用户名

DROP USER user1@localhost;

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;