Bruno,
> I think you might be able to do this using (one sided) outer joins of the
event
> table to the Case and Trial Group tables. The join rules will need to work
for
> exactly one of the two tables. You probably will want to use case statements
in
> the select list to pick values from the right table.
Yeah, I'm doing that in some places. It just doesn't work for all queries.
COALESCE() is my friend.
--
-Josh BerkusAglio Database SolutionsSan Francisco