On Wed, Nov 4, 2015 at 8:41 AM, 'checkmail' check_m...@satron.de
[firebird-support] <firebird-support@yahoogroups.com> wrote:
>
>
> two tables
>
>
>
> A:
>
> Field1, Field2, Field3, Field4, Field5
>
>
>
> B
>
> FieldA, FieldB, FieldC
>
>
>
> Now I would like to get the following:
>
>
>
> Sum(A.field3) where a.field1 = condition1 and a.field2 = condition2
>
> In the same statement I would include
>
> Sum(b.fieldc) where b.fielda = a.field4 and b.fieldb = a.field5
>
>
>
Without having tried it, I suggest:
select sum (A.field3) from A where A.field1 = condition1 and A.field2 =
condition2
UNION
select sum (b.fieldc) from B inner join A
where A.field1 = condition1
and A.field2 = condition2
and B.fielda = A.field4
and B.fieldb = A.field5
If A.field3 and B.fieldc are of different types you may need to cast them.
Good luck,
Ann
>
