Hello,
in the further version of firebird I can execute the following and get the real value of m (exists in tlager_sum) select a.teilenr, a.bezeichnung, a.minb, coalesce(b.menge,0) as m, a.typ from tteile a left join tlager_sum b on (a.teilenr = b.teilenr) where ((a.minb > coalesce(b.menge,0)) and (a.typ = 1)) order by a.teilenr In any case when it is no amount in the table tlager_sum (null), it should seen as 0 (not present) and if the minimum amount iss higher.. But, since fb 3 I get 0, why? The tlager_sum has for many records a mass. If I change to a.minb > b.menge it works for these records, but not for any with no amount. What can be the issue? Thanks Best regards Olaf
