select ks.lekime || '-' || ks.sostav as LEKOVI from lek ks where
ks.lekid in
(
select lekid from
(
select count(r.lekid),r.lekid from lek l,recept r
where l.lekid = r.lekid
group by r.lekid
having count(r.lekid) < 3
) a
)