Re: [firebird-support] How write a query with a progressive sum field

[Luigi Siciliano luigi...@tiscalinet.it [firebird-support]]

Il 07/03/2016 11.58, Dimitry Sibiryakov s...@ibphoenix.com 
[firebird-support] ha scritto:
> sum(carcio-scarcio) over (<whatever you need>) as SALDO.

Ok, I understand but, "over" is unknow in firebird 2.5.5.

I modified my query like this:

select
    DT.DATA,
    DT.DOCUMENTO_ID,
    DT.NUMERO,
    DT.SERIE,
    DC.CARICO,
    DC.SCARICO,
    SUM(dc2.carico - DC2.SCARICO) AS saldo
from
    DOC_TESTA DT
    JOIN DOC_CORPO DC on DT.ID = DC.DOC_TESTA_ID
    left JOIN  DOC_CORPO DC2 ON (DC.DOC_TESTA_ID >= DC2.DOC_TESTA_ID)
                                 AND (DC.ARTICOLO_ID = DC2.ARTICOLO_ID)
WHERE
    DC.ARTICOLO_ID = :ID
GROUP BY
   DATA,
   DOCUMENTO_ID,
   NUMERO,
   SERIE
ORDER BY
    DATA,
    DOCUMENTO_ID,
    NUMERO,
    SERIE

but I have an issue:

if I have a row with CARICO = 0 and SCARICO = 0

then SALDO is added or subtracted of number present in last row with 
CARICO > 0 or SCARICO > 0

Thanks
-- 

Luigi Siciliano
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