如果你是全新安装，就可以跳过这一步啦
找到你的mysql的数据库目录下的 ragnarok 数据库目录，例如我的mysql安装在
d:mysql 这个目录下，就到 d:mysqldata 目录下找到 ragnarok 数据库目录
把它拷贝一份到其它地方！
[升级你的odbc - mysql odbc driver ]
首先打开你的控制面版，找到 [添加删除程序] 把旧的mysql odbc driver 删除
然后安装myodbc-3.51.11-1-win.exe
[删除你电脑里的旧版mysql服务]
如果你以前安装过旧版的，那就要看看如何完整从你的系统内删除mysql
在你从电脑里卸载旧的mysql数据库服务时
首先先在windows服务里停掉mysql的服务
再到控制面板里的增加删除程序内进行删除
但是你并不能完整的把mysql服务删除
那么就要在注册表里清除你的mysql服务
有几个地方：(应该有两项，不记得啦，大家查查吧)
1、hkey_local_machinesystemcontrolset001serviceseventlogapplicationmysql 目录删除
2、hkey_local_machinesystemcontrolset002serviceseventlogapplicationmysql 目录删除
3、hkey_local_machinesystemcurrentcontrolsetserviceseventlogapplicationmysql 目录删除
如下图所示：
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清除完以后，
还要记得把 c:windowsmy.ini 这个文件删除哦
然后重新启动计算机
再到你计算机服务里看一下
是不是mysql服务已经不见啦,好了可以进行安装新版的mysql啦！
[相关软件下载：]
mysql 4.1.11-win32 - for windows ( mysql 4.1.11-win32.exe ) -- 数据库服务
下载
http://down.21sun.net/webtools/mysql-4.1.11-win32.zip
connector/odbc - mysql odbc driver ( myodbc-3.51.11-1-win.exe ) -- 数据源
下载
http://down.21sun.net/webtools/myodbc-3.51.11-1-win.exe
mysql control center ( mysqlcc-0.9.4-win32.zip ) -- 管理工具
下载
http://down.21sun.net/webtools/mysqlcc-0.9.4-win32.zip
[mysql server 4.1.11的安装教程]
===============================================================================
1、运行mysql server 4.1 安装包
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2、点击(change..)选择安装路径，建议大家不要装在c盘！
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3、我选择了安装到d:mysql目录下,然后点击ok，进入下一步安装
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4、选择完安装路径以后点击next>进入下一步操作！
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5、点击install进行开始安装
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6、我们看到安装进度！
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7、选择skip sign-up 项，点击next>继续安装!
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8、到这里我们安装已经完成，选上configure the mysql server now后
点击 finish 进入mysql的配置工作
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9、进入mysql的配置界面！
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10、选择detailed configuration 选择后，点击next>进行下一步!
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11、选择server machine 然后点击next>继续！
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12、选择multifunctional database 然后点击next 继续!
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13、这一步默认即可（让你选择数据库文件的存放地点）建意默认！
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14、选上online transaction processing(oltp)然后点击next>继续!
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15、如下图，继续next>
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16、选择语言的支持！默认为standard character set
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17、记得要选上include bin directory in windows path 选项，继续
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18、如下图，输入密码，继续next>
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19、点击execute 开始完成配置并启动mysql服务！
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20、点击finish 完成你的mysql的全部安装！
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[恢复 cathena mysql 数据库的备份]
===============================================================================
把你刚才备份的 ragnarok 目录，拷贝到你的mysql数据库目录下面，即完成对mysql版本的升级
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