mysql 重装问题
安装MySQL最后一步出现错误Error Nr.1045Connection Error
Error Nr.1045
Access denied for user 'root'@'localhost' (using password:NO)
http://img.blog.csdn.net/20150711234410015?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
1.停止MySQL服务:这台电脑-->右键 管理-->服务和应用程序-->服务 找到名为"MySQL"的服务 右键停用
2.进控制面板卸载MySQL
3.进入系统通用的数据文件夹删除MySQL文件夹
注意XP和win7目录不一样
XP目录:C:/Documents and Settings/All Users/Application Data
win7/8/8.1/10目录:C:/ProgramData或者%ProgramData%
注意:win7/8/8.1/10系统默认不显示通用数据文件夹,需要通过查看-->隐藏的项目显示
http://img.blog.csdn.net/20150712000304550?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
http://img.blog.csdn.net/20150712000458704?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
删除上图的MySQL文件夹即可
4.重新安装 这次不报错了
http://img.blog.csdn.net/20150712000915142?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
附:常见的系统内置环境变量
C:/Users/[用户名]/AppData/Roaming%AppData%
C:/Documents and Settings/[用户名]/Application Data%AppData%
C:/ProgramData%ProgramData%
C:/Windows%SystemRoot%
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