IMO
if you can make a view/sp that would be the way to go.
if not you could possible do something similar using a Crystal Command. as a warning I have found commands to have much worse perforamnce in my environment.
basically if i understand your issue you need to find maximum values from your sub tables and then join those to the main table which youc an do via a SQL view/sp or the crystal command.
Others might be able to make another suggestion...
Edited by DBlank - 17 Sep 2010 at 9:13am