>>>>>>Hi,
>>>>>>
>>>>>>How I would create a SQL Select for the following case:
>>>>>>Table 1
>>>>>>

>>>>>>PART_NO   PART_PK    PART_QTY
>>>>>>"123"          1                 34
>>>>>>"ABC"         2                 0
>>>>>>"NBZ"         3                 12
>>>>>>

>>>>>>
>>>>>>Table 2
>>>>>>

>>>>>>PART_PK       QTY
>>>>>>1                    3
>>>>>>1                    4
>>>>>>1                    10
>>>>>>3                     1
>>>>>>2                     6
>>>>>>3                     2
>>>>>>2                     35
>>>>>>

>>>>>>
>>>>>>Resulting query should be
>>>>>>

>>>>>>PART_NO         PART_QTY      ACT_QTY   (Act Qty is SUM of QTY in Table 2 field QTY)
>>>>>>"123"                34                   17
>>>>>>"ABC"               0                      41
>>>>>>"NBZ"              12                     3
>>>>>>

>>>>>>
>>>>>>TIA
>>>>>>
>>>>>>UPDATE: I know that the SQL Select should consist of two SQL Select:
>>>>>>

>>>>>>select PART_NO, PART_QTY ..... (SELECT SUM(QTY) AS ACT_QTY from Table2 GROUP BY PART_PK) AS ACT_QTY FROM Table1
>>>>>>

>>>>>>
>>>>>>But I don't know how to "connect" the main SQL Select with the SUB-SQL Select
>>>>>
>>>>>Dmitry,
>>>>>
>>>>>A single statement should suffice, I think:
>>>>>
>>>>>

>>>>>SELECT T1.PART_NO, T1.PART_QTY, SUM(T2.QTY) ;
>>>>>	FROM T1 INNER JOIN T2 ON T2.PART_PK = T1.PART_PK ;
>>>>>	GROUP BY 1, 2
>>>>>

>>>>
>>>>Antonio,
>>>>
>>>>First, thank you very much.
>>>>Your approach is much simpler, of course. But I also need several other fields from the T1 (e.g. PART_DESCR). So, would I have to use MAX(T1.PART_DESCR) as PART_DESCR to get those "extra" fields?
>>>
>>>Dmitry,
>>>
>>>This will give all the fields from first table.
>>>
>>>

>>>SELECT T1.*, TS.QTY ;
>>>	FROM T1 INNER JOIN (SELECT PART_PK, SUM(QTY) AS QTY FROM T2 GROUP BY PART_PK) TS ON TS.PART_PK = T1.PART_PK
>>>

>>
>>Antonio,
>>Thank you very much!
>>
>>Last question, please. If I wanted to select only those records from T1 that haveT1.PART_QTY different from the TS.QTY, I would have to add the HAVING, right? As, off the top:
>>
>>

>>SELECT T1.*, TS.QTY ;
>>	FROM T1 INNER JOIN (SELECT PART_PK, SUM(QTY) AS QTY FROM T2 GROUP BY PART_PK) TS ON TS.PART_PK = T1.PART_PK HAVING TS.QTY <> T1.PART_QTY
>>

>
>Don't mention it, Dmitry, it's always a pleasure.
>
>Using AND instead of HAVING would do the trick, in this case, and I suspect (and it's only a suspicion) that it would escalate better.

You are right. HAVING does not work as I get an error that it is not contained in either an aggregate function or the GROUP BY clause. I will go with the AND. Again, thank you!