Ага, проше всего запросом типа
select b.barcode "Штрихкод",c.name "Наименование карточки",
c.article "Артикул"
from supermag.smcard c,supermag.smstoreunits b
where c.article in
(select article from supermag.smcard where idclass in
(select id from supermag.sacardclass where tree like '1.1.1.'))
and b.article(+)=c.article