RE: SQL dividing the sum of two results on a select

Dave, 

You are getting whacked by the decimal precision rules in place for
expressions.  Whenever calculating an expressions, the rule is to not lose
"whole digits", or anything to the left of the decimal point.  Since you're
calculating a percentage, you need to force the result to be of a size that
will hold the result.  

SELECT                        
              TSSLS#,
               IDGRP,
              SUM(TSSLS$),               
              SUM(TSCOMD),
              dec(SUM(TSCOMD)/SUM(TSSLS$),20,10)
 FROM LIB.SLPTS
 JOIN LIB.INDESCRP  ON IDS# = TSPRD and IDSF = 'A' 
 WHERE IDGRP = 957 AND   TSSTS <> 'D'
GROUP BY IDGRP, TSSLS#
ORDER BY IDGRP, TSSLS#

There's a little about assignment rules here:
http://publib.boulder.ibm.com/iseries/v5r1/ic2924/info/db2/rbafzmst47.htm


Eric DeLong
Sally Beauty Company
MIS-Project Manager (BSG)
940-898-7863 or ext. 1863



-----Original Message-----
From: Smith, Dave [mailto:DSmith@xxxxxxxxx]
Sent: Thursday, September 18, 2003 12:23 PM
To: midrange-l@xxxxxxxxxxxx
Subject: SQL dividing the sum of two results on a select


Could anybody tell me why (SUM(TSCOMD)/SUM(TSSLS$)) always returns 0 in the
following select statement:

V5R2,
The two SUM() fields never equal 0 yet the result of the division comes back
as 0?????????

SELECT                        
              TSSLS#,
               IDGRP,
              SUM(TSSLS$),               
              SUM(TSCOMD),
              (SUM(TSCOMD)/SUM(TSSLS$))
 FROM LIB.SLPTS
 JOIN LIB.INDESCRP  ON IDS# = TSPRD and IDSF = 'A' 
 WHERE IDGRP = 957 AND   TSSTS <> 'D'
GROUP BY IDGRP, TSSLS#
ORDER BY IDGRP, TSSLS#


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