Steps to know or check or identify which PSU version has been applied to your oracle database

Hi
Following are the two steps to know which PSU has been applied to your database.

For database PSU:
opatch lsinventory -bugs_fixed |grep -i "PSU"

For GRID PSU:
opatch lsinventory -bugs_fixed | grep -i "GI PSU"

Or
select * from registry$history (for database)