MySQL卸载，安装

MySQL卸载：https://www.cnblogs.com/Lemon-ZYJ/p/14313289.html

MySQL安装：https://www.cnblogs.com/Lemon-ZYJ/p/11275012.html

卸载mysql后再安装提示The service already exists!问题解决方法：

https://www.cnblogs.com/Lemon-ZYJ/p/14313281.html