How about select a from Alpha a where {predicates on a} and not exists (select b from Beta b where b.alpha = a and {other predicates on b})
----- Pinaki Poddar Chair, Apache OpenJPA Project -- View this message in context: http://openjpa.208410.n2.nabble.com/left-joins-wheres-and-IN-tp7131885p7133073.html Sent from the OpenJPA Users mailing list archive at Nabble.com.