Date conversion problem

I'm comparing 2 dates and I need the result in HH24:MI:SS but I get the result as a number

here is my simple query

select fin_update - debut_update
from lcni_mgr.update_table

I'm looking for the magic formula

Thank you

P. Courtois
courtoip_at_videotron.com Received on Sat May 25 2002 - 16:20:05 CDT