Max Date \ Last Record

We have a UD table that references the Resource Groups and Resources and what we would like to do is run a BAQ that will link to JobOpDtl with our UD table and show the last used date (Job Close Date on Job Head?) for each record.   I just can't seem to find the links to do this - is it possible?  We're on Vantage 8.03.409a - Thanks.