mysql能装两个。安装步骤：1、在c盘中正常安装第一个mysql，然后关闭该服务；2、将另一个MySQL的文件放置到D盘中；3、配置D盘的my.ini文件，将所有端口改为3307；4、创建第二个mysql的服务，修改注册表配置即可。
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一台电脑上安装两个mysql的步骤
第一步：正常安装第一个mysql，然后在控制面板——管理工具——服务 关闭这个服务；
第二步：复制C:\\Program Files下的MySQL文件夹，复制到E盘；
第三步：找到原mysql的my.ini文件（有些直接在C:\\Program Files，有些不在，我这次是在C:\\ProgramData\\MySQL\\MySQL Server 5.7下面）
第四步：复制找到的原mysql的my文件放到E:\\MySQL\\mysql_base 这个mysql_base文件夹是新建的
第五步：修改复制过来的my文件，如图
这个是把所有端口改为3307，C盘那个mysql端口是3306
修改basedir和datadir 我这里之前复制mysql文件夹的时候data文件夹不在一起，在programdata那里，所以要去programdata那里把data文件夹复制过来
第六步 创建服务
首先cmd转到E:\\MySQL\\MySQL Server 5.7\\bin这个目录下
然后写
mysqld install MySQL2 --defaults-file="E:\\MySQL\\mysql_base\\my.ini"
第七步 修改注册表
运行-——regedit 打开注册表
HKEY_LOCAL_MACHINE-->SYSTEM-->CurrentControlSet-->Services 就能找到MySQL2了
修改MySQL2的内容如图
基本上就是修改defaults前面那一节 找到mysqld所在的路径放上去就行
第八步 控制面板控制面板——管理工具——服务 启用之前那个MySQL和刚刚这个MySQL2
大致就是这样了。
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