Jeden způsob:
SELECT DISTINCT sc.StoreId
FROM StoreClients sc
WHERE NOT EXISTS(
SELECT * FROM StoreClients sc2
WHERE sc2.StoreId = sc.StoreId AND sc2.ClientId = 5)
Jeden způsob:
SELECT DISTINCT sc.StoreId
FROM StoreClients sc
WHERE NOT EXISTS(
SELECT * FROM StoreClients sc2
WHERE sc2.StoreId = sc.StoreId AND sc2.ClientId = 5)