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The only caveat is what to do with a header with no detail.
Do you set qty to zeros or do you not update it?
select * from qtemp/header
....+....1....+....2....+....3....+
MYKEY1 MYKEY2 QTY
A A 5
A 2 6
B 1 7
******** End of data ********
select * from qtemp/detail
....+....1....+....2....+....3....+....4....+....5..
MYKEY1 MYKEY2 TRAN# QTY
A 2 5 27
A 2 6 45
******** End of data ********
UPDATE QTEMP/HEADER
SET QTY = COALESCE(
(SELECT SUM(QTY) FROM QTEMP/DETAIL
WHERE HEADER.MYKEY1=DETAIL.MYKEY1 AND HEADER.MYKEY2=DETAIL.MYKEY2)
, 0)
select * from qtemp/header
....+....1....+....2....+....3....+
MYKEY1 MYKEY2 QTY
A A 0
A 2 72
B 1 0
******** End of data ********
If you have orpan detail records and you need to insert those into header,
that's a different story.
Rob Berendt
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