重装系统C盘格式化，MYSQL恢复

背景：mysql在E盘，但是C盘重装系统，以前的注册表之类的都没有了，想重新恢复mysql的使用。

1. 配置以前的环境变量

2. 按照下面的步骤注册并启动服务

   C:\Users\Administrator>net stop mysql
   没有启动 mysql 服务。

   请键入 NET HELPMSG 3521 以获得更多的帮助。

   C:\Users\Administrator>sc delete mysql
   [SC] DeleteService 成功

   C:\Users\Administrator>E:

   E:>cd /d "E:\Mysql\mysql-5.7.37-winx64\bin"

   E:\MySQL\mysql-5.7.37-winx64\bin>mysqld --install mysql --defaults-file="E:\Mysql\mysql-5.7.37-winx64\my.ini"
   Service successfully installed.

   E:\MySQL\mysql-5.7.37-winx64\bin>net start mysql
   mysql 服务正在启动 .
   mysql 服务已经启动成功。

   E:\MySQL\mysql-5.7.37-winx64\bin>mysql -u root -p
   Enter password: *******
   Welcome to the MySQL monitor. Commands end with ; or \g.
   Your MySQL connection id is 2
   Server version: 5.7.37 MySQL Community Server (GPL)

   Copyright (c) 2000, 2022, Oracle and/or its affiliates.

   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>