Oracle Database: Find CPU or PSU Patch History

col ACTION_TIME format a30 col ACTION format a10 col NAMESPACE format a10 col VERSION format A15 col BUNDLE_SERIES format a8 col COMMENTS format a30 set lines 120 select ACTION_TIME, ACTION, NAMESPACE, VERSION,BUNDLE_SERIES, COMMENTS from sys.registry$history order by ACTION_TIME;
 * Check the COMMENTS column of the registry$history which will get updated after the post-patch step (catbundle.sql) ran.

ACTION_TIME                   ACTION     NAMESPACE  VERSION         BUNDLE_S COMMENTS -- -- -- --- -- 25-JUN-12 11.58.27.818024 PM   UPGRADE    SERVER     11.1.0.7.0               Upgraded from 11.1.0.7.0 26-JUN-12 07.06.06.048184 AM  UPGRADE    SERVER     11.1.0.7.0               Upgraded from 11.1.0.7.0 17-FEB-13 09.46.01.324012 AM  APPLY      SERVER     11.1.0.7        PSU      PSU 11.1.0.7.12