How to Downgrade a Single Pluggable Oracle Database ( PDB ) to previous release
(Doc ID 2172185.1)
Last updated on OCTOBER 31, 2019
Applies to:Oracle Database - Enterprise Edition - Version 12.2 BETA1 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.
To downgrade one PDB without downgrading the whole CDB
a. To unplug a PDB from a release 184.108.40.206 CDB, downgrade it, and then plug it in to a release 220.127.116.11 CDB
b. To unplug a PDB from a release 12.2 CDB, downgrade it, and then plug it in to a release 18.104.22.168 CDB
The process discussed in this article is a script based downgrade. This article does not discuss the use of Export/Import, Data Pump or other methods to move data from one version to another.
Oracle binaries of the release/version to which the downgrade is performed should be available/installed on the server before starting the downgrade process. If you have uninstalled the Oracle executable's to which you want to downgrade, please re-install the oracle binaries to the correct version/patch level for the downgrade.
This process is intended to downgrade a database that was successfully upgraded to 12c. It is not intended to back out from a failed upgrade. You can only downgrade to the release and patch level you upgraded from.
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