CentOS7 installation mysql error: Failed to start mysqld.service: Unit not found

Error reported:

[root@hecs-357186 tomcat]# systemctl start mysql.service
Failed to start mysql.service: Unit not found.

solve:

yum install mariadb-embedded mariadb-libs mariadb-bench mariadb mariadb-sever

After installation, I tried to start it again. It still failed and kept reporting errors. After installing mariadb-server again, it somehow succeeded.

yum install -y mariadb-server