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Warning: Null value is eliminated by an aggregate or other SET operation.???

Posted on 2006-07-07
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Last Modified: 2008-01-09
Hi all

I have this query below when i run it gives a message:
Warning: Null value is eliminated by an aggregate or other SET operation.

How do I solve that warning?

Please kindly assist, thanks

SELECT
R1.JobNumber,
R1.JobName,
R1.ProjectManagerNumber,
CASE WHEN R1.LastTimeReg = '1900.01.01' THEN 'N/A' ELSE R1.LastTimeReg END AS LastTimeReg,
CASE WHEN R1.LastExpenseReg = '1900.01.01' THEN 'N/A' ELSE R1.LastExpenseReg END AS LastExpenseReg,
CASE WHEN R1.LastPOReg = '1900.01.01' THEN 'N/A' ELSE R1.LastPOReg END  AS LastPOReg

FROM
(SELECT
JH.JobNumber,
JH.JobName,
JH.ProjectManagerNumber,
ISNULL(MAX(TSL.PeriodStart), '1900.01.01') AS LastTimeReg,
ISNULL(MAX(ESL.DateOfEntry), '1900.01.01') AS LastExpenseReg,
ISNULL(MAX(RH.CreatedDate), '1900.01.01') AS LastPOReg

FROM
JobHeader JH LEFT OUTER JOIN TimeSheetLine TSL ON JH.JobNumber = TSL.JobNumber
LEFT OUTER JOIN ExpenseSheetLine ESL ON JH.JobNumber = ESL.JobNumber
LEFT OUTER JOIN RequisitionHeader RH ON JH.JobNumber = RH.JobNumber
WHERE
(JH.IsBlocked = 0 AND JH.BlockedForInvoicing = 0 AND JH.Closed = 0 AND JH.Template = 0)
GROUP BY
JH.JobNumber,
JH.JobName,
JH.ProjectManagerNumber
) AS R1

WHERE
R1.ProjectManagerNumber  = '300020'
AND (R1.LastTimeReg != '1900.01.01' OR R1.LastExpenseReg != '1900.01.01' OR R1.LastPOReg != '1900.01.01')
AND ((DateDiff(Day, R1.LastTimeReg, GetDate()) >= 28) AND (DateDiff(Day,R1.LastExpenseReg, GetDate()) >= 28) AND (DateDiff(Day, R1.LastPOReg, GetDate()) >= 28))
0
Comment
Question by:minichicken
4 Comments
 
LVL 25

Accepted Solution

by:
Mr_Peerapol earned 500 total points
ID: 17058329
I guess that some records might have NULL values in TSL.PeriodStart, ESL.DateOfEntry, RH.CreatedDate.

You can do like this:

ISNULL(MAX(ISNULL(TSL.PeriodStart, '1900.01.01')), '1900.01.01') AS LastTimeReg,
ISNULL(MAX(ISNULL(ESL.DateOfEntry, '1900.01.01')), '1900.01.01') AS LastExpenseReg,
ISNULL(MAX(ISNULL(RH.CreatedDate, '1900.01.01')), '1900.01.01') AS LastPOReg
0
 
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 17058331
0
 
LVL 23

Expert Comment

by:Racim BOUDJAKDJI
ID: 17058434
Get rid of NULL values on your database.  Simplest and long lasting effect solution.
0
 
LVL 12

Author Comment

by:minichicken
ID: 17058452
Perfect Mr_Peerapol, you the best!!
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