Implement the Logic in Mapping to select, compare and update on one table

Question

Hi All,
We have a Sales Order history table *(HISTORY_TABLE)* and we want implement the below logic in warehouse builder where we are using only one table for checking the condition and selecting the records to update in the HISTORY_TABLE.
Like
SELECT ORDERNO, LINENO, ORDERTYPE FROM HISTORY_TABLE A
WHERE EXISTS IN (SELECT ‘X’
FROM HISTORY_TABLE B
WHERE A. ORDERNO = B. ORDERNO
AND   A. LINENO = B. LINENO
AND   A.ORDERTYPE = B. ORDERTYPE
HAVING MAX (B.PDDJ) = 0)
Thanks in advance.

Answer 1

Hi,
you can implement this as
SELECT A.ORDERNO, A.LINENO, A.ORDERTYPE FROM HISTORY_TABLE A,
(SELECT ORDERNO,LINENO,ORDERTYPE FROM HISTORY_TABLE GROUP BY ORDERNO,LINENO,ORDERTYPE HAVING MAX(PDDJ) = 0) B
WHERE A.ORDERNO = B.ORDERNO
AND A.LINENO = B.LINENO
AND A.ORDERTYPE = B.ORDERTYPE Use Aggregator (group by with having) and then Joiner
Regards,
Oleg