— From 12c onward

set lines 2000
select patch_id,status,description from dba_registry_sqlpatch;
(or)
SET LINESIZE 400
COLUMN action_time FORMAT A20
COLUMN action FORMAT A10
COLUMN status FORMAT A10
COLUMN description FORMAT A40
COLUMN version FORMAT A10
COLUMN bundle_series FORMAT A10
SELECT TO_CHAR(action_time, ‘DD-MON-YYYY HH24:MI:SS’) AS action_time,action, status, description,version,patch_id, bundle_series FROM sys.dba_registry_sqlpatch;

— For 11g and below:
set lines 2000
select * from dba_registry_history;

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