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Oracle: DBA_REGISTRY_SQLPATCH

Information about SQL patches that have been installed in the database.
Each record corresponds to an installation attempt of a given patch, either apply or roll back (column action).
DBA_REGISTRY_SQLPATCH is updated by the datapatch utility. 
select
   sqp.action_time,
   sqp.install_id,
   sqp.action,
   sqp.status,
   sqp.description,
   sqp.flags,
   sqp.logfile,
   sqp.patch_descriptor,
   sqp.patch_directory,
   sqp.patch_id,
   sqp.patch_type,
   sqp.patch_uid,
   sqp.ru_logfile,
   sqp.source_build_description,
   sqp.source_build_timestamp,
   sqp.source_version,
   sqp.target_build_description,
   sqp.target_build_timestamp,
   sqp.target_version
from
   sys.dba_registry_sqlpatch sqp
order by
   sqp.action_time desc
;

See also

dba_registry
dbms_qopatch
sys.registry$history
data dictionary

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/developm...', 1759973401, '216.73.216.133', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/development/databases/Oracle/installed/data-dictionary/registry/sqlpatch/index(78): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78