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HomeDatabaseMysql TutorialMySQL创建用户的三种方法

mysql创建用户的方法分成三种:INSERT USER表的方法、CREATE USER的方法、GRANT的方法。

前言:mysql创建用户的方法分成三种:INSERT USER表的方法、CREATE USER的方法、GRANT的方法。

一、账号名称的构成方式

账号的组成方式:用户名+主机(所以可以出现重复的用户名,跟其他的数据库不一样)

用户名:16字符以内.

主机名:可以用主机名和IP地址,,也可以用通配符

通配符说明:172.18.10.%(IP地址为172.18.10段的所有IP地址都可以访问)

二、通过CREATE USER命令进行创建用户

脚本:CREATE USER 'username'@'host' [IDENTIFIED BY 'PASSWORD'] 其中密码是可选项;

例子:CREATE USER 'john'@'192.168.189.71' IDENTIFIED BY "123";

CREATE USER 'john'@'192.168.189.%' IDENTIFIED BY "123";

CREATE USER 'john'@' %' ;

说明:该方法创建出来的用户只有连接数据库的权限,需要后续继续授权;

三、通过GRANT命令创建用户

个人习惯一般用这种方法进行创建用户,当数据库存在用户的时候GRANT会对用户进行授权,但当数据库不存在该用户的时候,就会创建相应的用户并进行授权。(说明上面那步是多余的)

脚本:

GRANT ON

[object] [IDENTIFIED BY 'password']

[WITH GRANT OPTION];

MAX_QUERIES_PER_HOUR count

MAX_UPDATES_PER_HOUR count

MAX_CONNECTIONS_PER_HOUR count

MAX_USER_CONNECTIONS count

说明:priv代表权限select,insert,update,delete,create,drop,index,alter,grant,references,reload,shutdown,process,file等14个权限

例子:mysql>grant select,insert,update,delete,create,drop on test.hr to john@192.168.10.1 identified by '123';

说明:给主机为192.168.10.1的用户john分配可对数据库test的hr表进行select,insert,update,delete,create,drop等操作的权限,并设定口令为123。

mysql>grant all privileges on test.* to joe@192.168.10.1 identified by '123';

说明:给主机为192.168.10.1的用户john分配可对数据库test所有表进行所有操作的权限,并设定口令为123。

mysql>grant all privileges on *.* to john@192.168.10.1 identified by '123';

说明:给主机为192.168.10.1的用户john分配可对所有数据库的所有表进行所有操作的权限,并设定口令为123。

mysql>grant all privileges on *.* to john@localhost identified by '123';

说明:用户john分配可对所有数据库的所有表进行所有操作的权限,并设定口令为123。

四、直接向mysql.user表插入记录(该方法个人很少用)

因为数据库的用户信息都是保存在mysql.user这张表的,所以直接对该表进行插入语句,即可完成用户的创建;

mysql> insert into user (host,user,password) values ('%','john',password('123'));

五、完成用户的创建后,请记得刷新系统权限表;

mysql>flush privileges;

总结:虽然创建用户的方法有三种,个人还是倾向于第二种方法,一步到位,简单明了;

其他的两种方法只是有助于理解数据库的原理而已;

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