Administering Oracle Database Classic Cloud Service Patching Database Classic Cloud Service 7 Patching Database Classic Cloud Service This section explains how to apply a patch to Oracle Database Classic Cloud Service, and roll back the patch as necessary. Topics Viewing Available Patches Checking Prerequisites Before Applying a Patch Applying a Patch Rolling Back a Patch or Failed Patch Applying a Patch to a Test Deployment Patching a Hybrid DR Deployment The dbpatchm.cfg Configuration File For general information about patching Oracle Database, see "Patch Set Updates and Requirements for Upgrading Oracle Database" in the Oracle Database Upgrade Guide for Release 18, 12.2, 12.1 or 11.2.