柠檬墨绿色 发表于 2016/11/19 13:44

Mysql添加用户,给用户授权

  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:

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  CREATE USER 'javacui'@'localhost' IDENTIFIED BY '123456';

  CREATE USER 'javacui'@'172.20.0.0/255.255.0.0' IDENDIFIED BY '123456';

  CREATE USER 'javacui'@'%' IDENTIFIED BY '123456';

  CREATE USER 'javacui'@'%' IDENTIFIED BY '';

  CREATE USER 'javacui'@'%';

  授权

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  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:

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  GRANT SELECT, INSERT ON test.user TO 'javacui'@'%';

  GRANT ALL ON *.* TO 'javacui'@'%';

  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

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

  设置与更改用户密码

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

  如果是当前登陆用户用

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  SET PASSWORD = PASSWORD("newpassword");

  撤销用户权限

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

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

  例子

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  REVOKE SELECT ON *.* FROM 'javacui'@'%';

  注意:

  假如你在给用户’javacui’@'%’授权的时候是这样的(或类似 的):GRANT SELECT ON test.user TO‘javacui’@'%’, 则在使用 REVOKE SELECT ON *.* FROM‘javacui’@'%’;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 ‘javacui’@'%’;则 REVOKE SELECT ON test.user FROM‘javacui’@'%’;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 ‘javacui’@'%’; 查看

  删除用户

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  DROP USER ‘username’@'host’;

  操作后切记刷新数据库

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  flush privileges;

  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 masterwww.9ask.cn/xiamen/

  CLIENT

  servers are.

  REPLICATION SLAVE

  Needed for replication slaves.
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