MySql实现远程链接的三种方法

 注意：mysql默认的root帐户只能在本地链接

一、进入mysql，建立一个新用户root,密码为root：

   格式：grant 权限 on 数据库名.表名 to 用户@登陆主机 identified by "用户密码";
           grant select,update,insert,delete on *.* to root@192.168.1.12 identified by "root";

   原先数据表结构

mysql> use mysql;
Database changed
mysql> select host,user,password from user;
+-----------+------+-------------------------------------------+
| host      | user | password                                  |
+-----------+------+-------------------------------------------+
| localhost | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
+-----------+------+-------------------------------------------+

   执行上述语句后结果

mysql> use mysql;
Database changed
mysql> select host,user,password from user;
+--------------+------+-------------------------------------------+
| host         | user | password                                  |
+--------------+------+-------------------------------------------+
| localhost    | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
| 192.168.1.12 | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
+--------------+------+-------------------------------------------+
2 rows in set (0.00 sec)

 

   能够看到在user表中已有刚才建立的root用户。host字段表示登陆的主机，其值能够用IP，也可用主机名，

   (1)有时想用本地IP登陆，那么能够将以上的Host值改成本身的Ip便可。

二、实现远程链接(受权法)

   将host字段的值改成%就表示在任何客户端机器上能以root用户登陆到mysql服务器，建议在开发时设为%。   
   update user set host = ’%’ where user = ’root’;

   将权限改成ALL PRIVILEGES

mysql> use mysql;
Database changed
mysql> grant all privileges  on *.* to root@'%' identified by "root";
Query OK, 0 rows affected (0.00 sec)

mysql> select host,user,password from user;
+--------------+------+-------------------------------------------+
| host         | user | password                                  |
+--------------+------+-------------------------------------------+
| localhost    | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
| 192.168.1.12 | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
| %            | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
+--------------+------+-------------------------------------------+
3 rows in set (0.00 sec)

这样机器就能够以用户名root密码root远程访问该机器上的MySql.

三、实现远程链接（改表法）

use mysql;

update user set host = '%' where user = 'root';

这样在远端就能够经过root用户访问Mysql.