CentOS switches and installs mysql5.7 and mysql8.0

Centos Switch installation mysql5.7 and mysql8.0

https://www.cnblogs.com/subsea/p/15892403.html

Here, in the process of processing ,

1、 perform yum install mysql-community-server -y There's a problem ：
Error: Unable to find a match: mysql-community-server

solve ：https://blog.csdn.net/csdn_yrc/article/details/119886305

2、Error: Transaction test error:
file /etc/my.cnf from install of mysql-community-server-5.7.38-1.el7.x86_64 conflicts with file from package mariadb-connector-c-config-3.1.11-2.tl3.noarch

Kill the conflicting bags directly
yum remove mariadb-connector-c-config-3.1.11-2.tl3.noarch

There is no need for mariadb