Extract only records that have difference sum

Question

Hi all. I'm on oracle 10g.
I have a question. I have two select statement, both with sum function.
I want that from first select I must retrieve only records which have different sum.
Here is the code:
first select statement
select a.codice_contratto codice_contratto, a.codice_qualifica codice_qualifica,
a.codice_istituzione codice_istituzione, sum(a.nume_dip_tot) tot, sum(a.nume_dip_donne) donne
from tn_bz_t_10 a
where a.anno = 2006
group by a.codice_contratto, a.codice_qualifica, a.codice_istituzione
order by a.codice_contratto, a.codice_qualifica, a.codice_istituzione
secon select statement
select codice_contratto, codice_qualifica,
codice_istituzione,
sum(nume_dip_tot17) tot, sum(nume_dip_donne17) donne
from tabella10
where anno = 2006
and versione = 'D'
and nume_dip_tot17 <> 0
group by codice_contratto, codice_qualifica, codice_istituzione
order by codice_contratto,codice_qualifica,codice_istituzione
My goal is that from first select I must retrieve only those records which have difference sum, tot or donne,
from second select...
How can I achieve that??
Thanks all for collaboration,
Fabrizio Delli Priscoli
Edited by: Fabrizio Delli Priscoli on 23-set-2010 14.25

Answer 1

Hi, Fabrizio,
(1) an inner join, or
(2) NOT IN
are two ways that will probably be efficient.
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