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
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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?
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. |