MySQL versions via dpkg -l 'mysql*' | grep ^ii

dpkg -l 'mysql*' | grep ^ii
ii  mysql-apt-config                      0.8.9-1                                    all          Auto configuration for MySQL APT Repo.
ii  mysql-client                          5.5.57-0ubuntu0.14.04.1                    all          MySQL database client (metapackage depending on the latest version)
ii  mysql-client-5.5                      5.5.57-0ubuntu0.14.04.1                    amd64        MySQL database client binaries
ii  mysql-client-core-5.5                 5.5.57-0ubuntu0.14.04.1                    amd64        MySQL database core client binaries
ii  mysql-common                          7.5.8-1ubuntu14.04                         amd64        MySQL Common
ii  mysql-server                          5.5.57-0ubuntu0.14.04.1                    all          MySQL database server (metapackage depending on the latest version)
ii  mysql-server-5.5                      5.5.57-0ubuntu0.14.04.1                    amd64        MySQL database server binaries and system database setup
ii  mysql-server-core-5.5                 5.5.58-0ubuntu0.14.04.1                    amd64        MySQL database server binaries
ii  mysql-workbench                       6.0.8+dfsg-2                               amd64        MySQL Workbench - a visual database modeling, administration and queuing tool
ii  mysql-workbench-data                  6.0.8+dfsg-2                               all          MySQL Workbench -- architecture independent data