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Ok, I reformatted your query a bit so that it was easier to read. What do
you want to happen when YEUXFILE.PQTY is < 0? If you just want to not return
the records you could add a where clause at the end.

SELECT 
 YEUXFILE.PRECID,
 YEUXFILE.CFTC, 
 YEUXFILE.PEXCH,
 YEUXFILE.PFC,
 YEUXFILE.ACCOUNT, 
 YEUXFILE.PFIRM,
 YEUXFILE.PSNAME,
 YEUXFILE.PQTY - COALESCE(YODIAC.PQTY,0) AS PQTY 
FROM 
 QS36F/YEUXFILE 
 LEFT OUTER JOIN 
                (
                SELECT 
                 PRECID,
                 ACCOUNT,
                 PFIRM,
                 PFC,
                 SUM(COALESCE(YODIAC.PQTY,0)) AS PQTY 
                FROM 
                 QS36F/YODIAC 
                GROUP  BY 
                 PRECID,
                 ACCOUNT,
                 PFIRM,
                 PFC
                ) AS YODIAC 
  ON YEUXFILE.ACCOUNT = YODIAC.ACCOUNT
Where
  YEUXFILE.PQTY >=0 



-----Original Message-----
From: Muralidhar Narayana [mailto:Muralidhar_Narayana@xxxxxxxxxxx] 
Sent: Tuesday, August 31, 2004 11:59 AM
To: rpg400-l@xxxxxxxxxxxx
Subject: SQL question

Below is my SQL. I have to do a small modification,

I have to execute this 'YEUXFILE.PQTY-COALESCE(YODIAC.PQTY,0) ' only when
YEUXFILE.PQTY is positive value. (ie. when YEUXFILE.PQTY is greater than or
equal to zero, I have to do that substraction)

Can some one help me to implement this in my already existing solution. I
tried but could not succeed.

Thanks for your help, I sincerely appreciate your help.

SELECT YEUXFILE.PRECID,YEUXFILE.CFTC, 

YEUXFILE.PEXCH,YEUXFILE.PFC,YEUXFILE.ACCOUNT, 

YEUXFILE.PFIRM,YEUXFILE.PSNAME,YEUXFILE.PQTY-COALESCE(YODIAC.PQTY,0) 

AS PQTY 

FROM QS36F/YEUXFILE 

LEFT OUTER JOIN (SELECT 

PRECID,ACCOUNT,PFIRM,PFC,SUM(COALESCE(YODIAC.PQTY, 

0)) AS 

PQTY 

FROM QS36F/YODIAC GROUP BY PRECID,ACCOUNT,PFIRM,PFC) 

AS 

YODIAC 

ON YEUXFILE.ACCOUNT = YODIAC.ACCOUNT 


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