MYSQL创建用户和授权方法(测试mysql5.7)
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. |
