操作系统:Microsoft windows server 2003
原数据库版本:mysql Ver 14.12 Distrib 5.0.22, for Win32 (ia32)
新数据库版本:mysql Ver 14.14 Distrib 5.1.55, for Win32 (ia32)
(数据库版本可以到mysql的bin目录下用mysql -version -uroot -p命令查询)
整个重装步骤大致分四个步骤进行,
第一步,备份原mysql中的所有数据库。
第二步,完全卸载mysql
第三步,下载安装新版mysql
第四步,导入备份的所有数据库到新mysql
需要注意的有3点:
1.卸载旧mysql要彻底,不能有残留。
2.安装新mysql时要设置对编码utf8。
3.需要解决mysql版本兼容性问题。
下面详细介绍这几步骤。
第一步,备份原mysql中的所有数据库。
(1)打开命令行窗口,进入mysql的bin目录。
操作:点击[开始]--[运行],输入cmd回车。
cd C:/回车
cd C:/Program Files/MySQL/MySQL Server 5.0/bin
以上路径仅供参考。具体请查看自己机器上的mysql安装目录。
(2)备份所有数据库。
操作:c:/Program Files/MySQL/MySQL Server 5.0/bin>mysqldump --all-database > D:/all_database.sql -uroot -p回车
Enter password: 输入密码,回车
注意上面命令中 -uroot中的root是mysql用户名,操作时以自己的用户名为准。
到此原mysql中所有数据库已经被备份到D:/目下的all_database.sql文件中。
第二步,完全卸载mysql
(1)点击[开始]--[运行],输入services.msc回车,进入服务管理窗口。
(2)服务里面找到MySQL服务,将MySQL的服务给停止。
(3)点击[开始]--[运行],输入console回车进入控制面板,找到添加删除程序,找到MySQL选择卸载。
(4)最后将MySQL安装目录和保存数据库数据的目录也删除。
通常这两个目录分别在C:/program files/mysql 和 C:/users/all users/mysql(或 C:/all users/application data/mysql)。目录有可能是隐藏的,需要设置文件夹选项显示隐藏目录。
(5)重新启动机器。
到此原mysql已经被完全卸载。
第三步,下载安装新版mysql
(1)打开http://dev.mysql.com/downloads/mysql/5.1.html#downloads
(2)选择Windows (x86, 32-bit), MSI Installer 5.1.55 106.1M 下载
(3)点击安装。
注意,安装步骤大部分选默认设置即可,但设置编码的那一步骤,一定要选utf8,而不是默认
的latin编码,否则将无法处理中文。
到此,新mysql已经成功安装。
第四步,导入备份的所有数据库到新mysql
(1)打开命令行窗口,进入mysql的bin目录 C:/Program Files/MySQL/MySQL Server 5.1/bin.
(2)导入所有数据库。
操作:c:/Program Files/MySQL/MySQL Server 5.1/bin>mysql -uroot -p回车
Enter password: 输入密码,回车。进到mysql>状态下。
输入source D:/all_database.sql回车。
成功后数据库已经被导进来。
(3)因为新版本的mysql是5.1,而旧版本是5.0,所以需要解决兼容问题。
接着上一步,输入exit回车,退出mysql>状态回到c:/Program Files/MySQL/MySQL Server 5.1/bin>目录下。
输入mysql_upgrade -uroot -p回车
Enter password: 输入密码,回车。
此步骤成功后,即重装mysql工作完毕。
附加:
1.可以把C:/Program Files/MySQL/MySQL Server 5.1/bin路径添加到系统环境变量中,便于操作myql.
2.可以再装一个mysql-front之类的工具,进行可视化操作。

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