Help on Converting inerr query to sub query

Question

Hi Guys,
This query is written in inner join, can any one try to write using sub query.
SELECT B.CNO
FROM CUSTEN A
INNER JOIN ORDS B
ON A.CNO = B.CNO
AND A.PRNO = B.PRNO
INNER JOIN ORDI C
ON B.ORDNO = C.ORDNO
INNER JOIN PRD D
ON C.PRNO = D.PRNO
WHERE B.STS = 'COM'
AND B.LMD >= A.LMD
GROUP BY B.CSTNO, C.PRNO
HAVING COUNT(B.ORDNO) > 1
Thanks in advance!
Regards,
LKRao
Edited by: kolipaka on Sep 18, 2012 6:37 PM
Edited by: kolipaka on Sep 18, 2012 6:38 PM

Answer 1

Hi,
kolipaka wrote:
Hi Guys,
This query is written in inner join, can any one try to write using sub query. Why?
We don't know your requirements, so we can't be sure if any solution we might think of meets your requirements.
... GROUP BY B.CSTNO, C.PRNOIf you really need to GROUP BY columns from different tables, then you almost certainly want to join those tables. You might be able to get the results you want with a scalar sub-query instead of a join, but that's needlessly complicated.
You said that what you posted is just a sub-query of some other query. Perhaps the solution involves making changes in that query, too. Post the complete query, CREATE TABLE and INSERT statments for a little sample data, the results you want from that data, and an explanation of how you get those results from that data. Say which columns are unique (expecially the columns used in the join conditions); that could be important.