Is there a CA provided process (utility) to uninstall the mdb whether it is on Oracle or SQL Server?
No, the MDB creation process does not provide an uninstall ability. Be aware that the DBMS is commonly connected across the enterprise, and may contain data outside the MDB schema itself. Therefore, there is no current automated way to safely remove it. If Oracle is removed - uninstalled - Oracle does not remove the database. Likewise, if SQL Server is removed, the database is not removed.
Uninstalling the MDB requires explicit action by a DBA or other authorized individual.