I'd expect opatch -lsinventory would show this, so long as SE1 is a selectable option at install time. Niall Litchfield On Jul 28, 2010 10:19 AM, "DBA Deepak" <oracle.tutorials@xxxxxxxxx> wrote: Gurus, Need to know whether Oracle Standard Edition ONE (OSE1) is installed or not. Is there any way to find it out? V$VERSION could not provide this information. -- Regards, Deepak Oracle DBA