I try this query:
select t.clndhf, t.ciusmd, t.nmismd, SUM(Quantity) as Num_Products
from
(
select clndhf, ciusmd, nmismd, sum(qtfdhf) as Quantity
from swapfilio.EESWPLFD join swapfilio.EESWPLFH
on SOCSLD = SOCSLH
and CODSLD = CODSLH
join swapfilio.gesmd
on SOCSLD = socsmd
and NIISLD =...