woodsw@hc-vnetops:~$ apt list --installed | grep mysql

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

libmysqlclient-dev/bionic-updates,bionic-security,now 5.7.30-0ubuntu0.18.04.1 amd64 [installed]
libmysqlclient20/bionic-updates,bionic-security,now 5.7.30-0ubuntu0.18.04.1 amd64 [installed,automatic]
mysql-client-5.7/bionic-updates,bionic-security,now 5.7.30-0ubuntu0.18.04.1 amd64 [installed,automatic]
mysql-client-core-5.7/bionic-updates,bionic-security,now 5.7.30-0ubuntu0.18.04.1 amd64 [installed,automatic]
mysql-common/bionic,bionic,now 5.8+1.0.4 all [installed,automatic]
mysql-server/bionic-updates,bionic-updates,bionic-security,bionic-security,now 5.7.30-0ubuntu0.18.04.1 all [installed]
mysql-server-5.7/bionic-updates,bionic-security,now 5.7.30-0ubuntu0.18.04.1 amd64 [installed,automatic]
mysql-server-core-5.7/bionic-updates,bionic-security,now 5.7.30-0ubuntu0.18.04.1 amd64 [installed,automatic]