MySQL 创建用户、授权用户、撤销用户权限、更改用户密码、删除用户(实用技巧)

MySQL创建用户并授权及撤销用户权限

运行环境：MySQL5.0

一、创建用户

命令:

CREATE USER 'username'@'host' IDENTIFIED BY 'password';

例子:

CREATE USER 'dog'@'localhost' IDENTIFIED BY '123456';CREATE USER 'pig'@'192.168.1.101_' IDENDIFIED BY '123456';CREATE USER 'pig'@'%' IDENTIFIED BY '123456';CREATE USER 'pig'@'%' IDENTIFIED BY '';CREATE USER 'pig'@'%';

命令:

GRANT privileges ON databasename.tablename TO 'username'@'host';

例子:

GRANT SELECT, INSERT ON test.user TO 'pig'@'%';GRANT ALL ON .* TO 'pig'@'%';

GRANT privileges ON databasename.tablename TO 'username'@'host' WITH GRANT OPTION;

命令:

SET PASSWORD FOR 'username'@'host' = PASSWORD('newpassword');

例子:

SET PASSWORD FOR 'pig'@'%' = PASSWORD("123456");

命令:

REVOKE privilege ON databasename.tablename FROM 'username'@'host';

例子: REVOKE SELECT ON . FROM 'pig'@'%';

注意: 假如你在给用户'pig'@'%'授权的时候是这样的(或类似的):GRANT SELECT ON test.user TO 'pig'@'%', 则在使用REVOKE SELECT ON . FROM 'pig'@'%';命令并不能撤销该用户对test数据库中user表的SELECT 操作.相反,如果授权使用的是GRANT SELECT ON . TO 'pig'@'%';则
REVOKE SELECT ON test.user FROM 'pig'@'%';命令也不能撤销该用户对test数据库中user表的Select 权限.

具体信息可以用命令SHOW GRANTS FOR 'pig'@'%'; 查看.

五、删除用户

命令:

DROP USER 'username'@'host';

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