TheSQLGuru (6/17/2016)
I would do it with an AND NOT EXISTS (SELECT ...) clause myself.
As would I. 🙂
select distinct item_id
from jec_item_sup jis
where supplier=77
and not exists (select * from jec_item_sup where supplier=jis.supplier and item_id=jis.item_id and primary_supplier='Y')