Centos7中卸载mysql5.7操作

首先是 rpm -qa|grep -i mysql

mysql-community-common-5.7.31-1.el7.x86_64
mysql-community-client-5.7.31-1.el7.x86_64
mysql-community-server-5.7.31-1.el7.x86_64
mysql-community-libs-5.7.31-1.el7.x86_64

开始卸载

yum remove mysql-community-libs-5.7.31-1.el7.x86_64
yum remove mysql-community-server-5.7.31-1.el7.x86_64
yum remove mysql-community-common-5.7.31-1.el7.x86_64
yum remove mysql-community-client-5.7.31-1.el7.x86_64

再次运行：rpm -qa|grep -i mysql

什么也没有了

查找mysql的其他相关文件

find / -name mysql

删除文件

rm -rf /etc/selinux/targeted/active/modules/100/mysql/
rm -rf /etc/selinux/targeted/tmp/modules/100/mysql
rm -rf /var/lib/mysql/
rm -rf /usr/share/mysql/

最后，删除日志

rm -rf /var/log/mysqld.log
rm -rf /var/log/mysql.log

到这里卸载完成，重新安装。