Hello Sri,
BO lets you set up an uncorrelated subquery using the query panel (I suppose this is old news to you). You could modify it into a correlated subquery by modifying the SQL with correlation names and applying the 'do not generate SQL' setting, but you will possibly run into trouble, cause objects retrieved will not comply with the SQL objects.
Last resort is to use a freehand SQL to do the job....
T. Blom
Information analyst
tbl@shimano-eu.com