MySQL创建用户与授权方法

MySQL中创建用户与授权的实现方法，对于刚开始接触mysql的朋友可以参考下

注:我的运行环境是widnows xp professional + MySQL5.0

一, 创建用户:

命令:CREATE USER ‘username’@’host’ IDENTIFIED BY ‘password’;

说明:username – 你将创建的用户名, host – 指定该用户在哪个主机上可以登陆,如果是本地用户可用localhost, 如果想让该用户可以从任意远程主机登陆,可以使用通配符%. password – 该用户的登陆密码,密码可以为空,如果为空则该用户可以不需要密码登陆服务器.

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’@’%’;

二,授权:

命令:GRANT privileges ON databasename.tablename TO ‘username’@’host’

说明: privileges – 用户的操作权限,如SELECT , INSERT , UPDATE 等(详细列表见该文最后面).如果要授予所的权限则使用ALL.;databasename – 数据库名,tablename-表名,如果要授予该用户对所有数据库和表的相应操作权限则可用*表示, 如*.*.

例子: GRANT SELECT, INSERT ON test.user TO ‘pig’@’%’;
GRANT ALL ON *.* TO ‘pig’@’%’;

注意:用以上命令授权的用户不能给其它用户授权,如果想让该用户可以授权,用以下命令:
GRANT privileges ON databasename.tablename TO ‘username’@’host’ WITH GRANT OPTION;

三.设置与更改用户密码

命令:SET PASSWORD FOR ‘username’@’host’ = PASSWORD(‘newpassword’);如果是当前登陆用户用SET PASSWORD = PASSWORD(“newpassword”);

例子: SET PASSWORD FOR ‘pig’@’%’ = PASSWORD(“123456”);

四.撤销用户权限

命令: REVOKE privilege ON databasename.tablename FROM ‘username’@’host’;

说明: privilege, databasename, tablename – 同授权部分.

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’;

附表:在MySQL中的操作权限

`ALTER`	Allows use of `ALTER TABLE`.
`ALTER ROUTINE`	Alters or drops stored routines.
`CREATE`	Allows use of `CREATE TABLE`.
`CREATE ROUTINE`	Creates stored routines.
`CREATE TEMPORARY TABLE`	Allows use of `CREATE TEMPORARY TABLE`.
`CREATE USER`	Allows use of `CREATE USER`, `DROP USER`, `RENAME USER`, and `REVOKE ALL PRIVILEGES`.
`CREATE VIEW`	Allows use of `CREATE VIEW`.
`DELETE`	Allows use of `DELETE`.
`DROP`	Allows use of `DROP TABLE`.
`EXECUTE`	Allows the user to run stored routines.
`FILE`	Allows use of `SELECT`... `INTO OUTFILE` and `LOAD DATA INFILE`.
`INDEX`	Allows use of `CREATE INDEX` and `DROP INDEX`.
`INSERT`	Allows use of `INSERT`.
`LOCK TABLES`	Allows use of `LOCK TABLES` on tables for which the user also has `SELECT` privileges.
`PROCESS`	Allows use of `SHOW FULL PROCESSLIST`.
`RELOAD`	Allows use of `FLUSH`.
`REPLICATION`	Allows the user to ask where slave or master
`CLIENT`	servers are.
`REPLICATION SLAVE`	Needed for replication slaves.
`SELECT`	Allows use of `SELECT`.
`SHOW DATABASES`	Allows use of `SHOW DATABASES`.
`SHOW VIEW`	Allows use of `SHOW CREATE VIEW`.
`SHUTDOWN`	Allows use of `mysqladmin shutdown`.
`SUPER`	Allows use of `CHANGE MASTER`, `KILL`, `PURGE MASTER LOGS`, and `SET GLOBAL` SQL statements. Allows `mysqladmin debug` command. Allows one extra connection to be made if maximum connections are reached.
`UPDATE`	Allows use of `UPDATE`.
`USAGE`	Allows connection without any specific privileges.