mysql有时候忘记密码了怎么办?我给出案例和说明!一下就解决了!

Windows下的实际操作如下

1.关闭正在运行的MySQL。

2.打开DOS窗口,转到mysql\bin目录。

3.输入mysqld --skip-grant-tables回车。如果没有出现提示信息,那就对了。

4.再开一个DOS窗口(因为刚才那个DOS窗口已经不能动了),转到mysql\bin目录。

5.输入mysql回车,如果成功,将出现MySQL提示符 >

6. 连接权限数据库>use mysql; (>是本来就有的提示符,别忘了最后的分号)

6.改密码:> update user set password=password("520") where user="root"; (别忘了最后的分号)

7.刷新权限(必须的步骤)>flush privileges;

8.退出 > \q

9.注销系统,再进入,开MySQL,使用用户名root和刚才设置的新密码123456登陆。

第一步

C:\Documents and Settings\Administrator>cd D:\web\www.php100.com\Mysql\MySQL Se

rver5.5\bin

C:\Documents and Settings\Administrator>d:

D:\web\www.php100.com\Mysql\MySQL Server5.5\bin>mysqld --skip-grant-tables

第二步

Microsoft Windows [版本 5.2.3790]

(C) 版权所有 1985-2003 Microsoft Corp.

C:\Documents and Settings\Administrator>cd D:\web\www.php100.com\Mysql\MySQL Se

rver5.5\bin

C:\Documents and Settings\Administrator>d:

D:\web\www.php100.com\Mysql\MySQL Server5.5\bin>mysql

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 1

Server version: 5.5.10 MySQL Community Server (GPL)

Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> use mysql;

Database changed

mysql> update user set password=password("520") where user="root";

Query OK, 1 row affected (0.00 sec)

Rows matched: 1 Changed: 1 Warnings: 0

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> \q

Bye

D:\web\www.php100.com\Mysql\MySQL Server5.5\bin>