如何在阿里云服务器(centos7)安装、卸载mysql数据库

先谈如何卸载再说如何安装吧

卸载mysql数据库

• 使用以下命令查看当前安装mysql情况，查找以前是否装有mysql
  • rpm -qa|grep -i mysql

[root@xxxxx ~]# rpm -qa|grep -i mysql

• 如果有可以卸载删除

1. rpm -ev mysql57-community-release-el7-8.noarch.rpm

         [root@xxxxx ~]# rpm -ev mysql57-community-release-el7-8.noarch.rpm

         要是删除不了报如下错：

error: package mysql57-community-release-el7-8.noarch.rpm is not installed

root@xxxxx ~]# rpm -ev mysql-community-libs-compat-5.7.25-1.el7.x86_64

error: Failed dependencies:

        libmysqlclient.so.18()(64bit) is needed by (installed) postfix-2:2.10.1-7.el7.x86_64

        libmysqlclient.so.18(libmysqlclient_18)(64bit) is needed by (installed) postfix-2:2.10.1-7.el7.x86_64

2.可以试第二种方案

yum remove mysql-community mysql-community-server mysql-community-libs mysql-community-common

[root@xxxxx ~]# yum remove mysql-community mysql-community-server mysql-community-libs mysql-community-common