>>>But what exactly do you want to achieve here?
>>>
>>>select TABLE1.*, SumInfo.Used_Quantity FROM TABLE1
>>>INNER JOIN (select TABLE2.ID_FLD, SUM(
>>> TABLE2.QUANTITY) as USED_QUANTITY FROM TABLE2 GROUP BY TABLE2.ID_FLD) SumInfo
>>>on Table1.ID_Fld = SumInfo.ID_Fld
>>>
>>>If you want to check FLD IN (SubSelect), then SubSelect MUST return only one field.
>>
>>Thank you. I think you are right. I will try your suggestion.
>
>You're welcome. The technique is called "derived tables" technique.
Thank you. It does work now.
"The creative process is nothing but a series of crises." Isaac Bashevis Singer
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