v$transaction.USED_UBLK is probably what you are looking for, it doesnt tell you the sql but the session thanks On Tue, May 13, 2014 at 10:28 AM, John Dunn <JDunn@xxxxxxxxx> wrote: > Is it possible to find out what sql statements are using up UNDO > tablespace space? > > > > Oracle 10g Enterprise Edition > > > > *John * > > >