Mysql 添加用户和数据库授权
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\’;
授权法。
例如，你想myuser使用mypassword从任何主机连接到mysql服务器的话。
Sql代码
1. GRANT ALL PRIVILEGES ON *.* TO \'myuser\'@\'%\' IDENTIFIED BY \'mypassword\' WITH
GRANT OPTION;
2.FLUSH PRIVILEGES;
如果你想允许用户myuser从ip为192.168.1.6的主机连接到mysql服务器，并使用mypassword作为密码
Sql代码
1. GRANT ALL PRIVILEGES ON *.* TO \'myuser\'@\'192.168.1.3\' IDENTIFIED BY
2. \'mypassword\' WITH GRANT OPTION;
3. FLUSH PRIVILEGES;
GRANT ALL PRIVILEGES ON *.* TO \'myuser\'@\'192.168.1.3\' IDENTIFIED BY
\'mypassword\' WITH GRANT OPTION;
FLUSH PRIVILEGES;
如果你想允许用户myuser从ip为192.168.1.6的主机连接到mysql服务器的dk数据库，并使用mypassword作为密码
Sql代码
1. GRANT ALL PRIVILEGES ON dk.* TO \'myuser\'@\'192.168.1.3\' IDENTIFIED BY
2. \'mypassword\' WITH GRANT OPTION;
3. FLUSH PRIVILEGES;
GRANT ALL PRIVILEGES ON dk.* TO \'myuser\'@\'192.168.1.3\' IDENTIFIED BY
\'mypassword\' WITH GRANT OPTION;
FLUSH PRIVILEGES;
注意授权后必须FLUSH PRIVILEGES;否则无法立即生效。