centos7.9下安装mysql5.7.33，使用rpm包安装

1、卸载系统自带的 mariadb-lib

[root@centos-linux ~]# rpm -qa|grep mariadb
mariadb-libs-5.5.44-2.el7.centos.x86_64
[root@centos-linux ~]# rpm -e mariadb-libs-5.5.44-2.el7.centos.x86_64 --nodeps

2.在官网（https://dev.mysql.com/downloads/mysql/）下载安装包 mysql-*.rpm-bundle.tar，使用命令 tar 解压缩，接下来按照下列顺序依次安装：

rpm -ivh mysql-community-common-5.7.33-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-5.7.33-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-5.7.33-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-5.7.33-1.el7.x86_64.rpm
rpm -ivh mysql-community-devel-5.7.33-1.el7.x86_64.rpm （可选）