>>Suppose I have the following SQL Select:
>>
>>
>>select SUM(FIELD1) AS FIELD1, SUM(PODET.ITEM_QUANT) AS ITEM_QUANT, SUM(POREC.REC_QTY) AS REC_QTY, POREC.PODET_PK FROM POREC RIGHT
>>JOIN PODET ON PODET.PODET_PK = POREC.PODET_PK
>>GROUP BY PODET.PODET_PK
>>HAVING SUM(POREC.REC_QTY) < SUM(Podet.ITEM_QUANT) > 0
>>
>>
>>What if all values of REC_QTY are NULL, what would be the SUM( REC_QTY )? In my test it works, that is, the SQL creates a query. But I am not sure if it is accurate.
>>
>>I tried to change the HAVING to something like this:
>>
>>
>>HAVING CASE SUM(POREC.REC_QTY) IS NULL THEN SUM(PODET.ITEM_QUANT)>0 ELSE
>>SUM(POREC.REC_QTY < SUM( PODET.ITEM_QUANT) END
>>
>>
>>But I get error. I suppose I can't use IS NULL with SUM(), Correct?
>
>If all REC_QTY are NULLs then the result of SUM() will be NULL you will not get any records.
Thank you.
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