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MS Access Sum Query- need a 0 return

Posted on 2008-10-29
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Last Modified: 2012-06-21
I have the following query below. The items are listed by Grouping, there is 4 possible groupings. i am attempted to sum up SumOfCC_CostEstimate by Grouping.  The count query works fine for each item that has least onc record, but ignores records where there is not matches.

I want to dislay all the possible groups, and if there is no records I want to show 0 in the SumOfCC_CostEstimate, in my example thewre is no records matching ProjectDisposition="On-Hold" and tblProjects.NLG)=Yes. I want to disaply

ProjectDisposition                          SumOfCC_CostEstimate
Cancelled                                                128000
Completed                                                 30000
Pending ITSC approval/prioritization      130000
On-Hold                                                   0 ' This is missing
SELECT tblProjects.ProjectDisposition, Sum(tblSizing.CC_CostEstimate) AS SumOfCC_CostEstimate

FROM (tblProjects LEFT JOIN tLUProjectStatus ON tblProjects.ProjectDisposition = tLUProjectStatus.DispositionDescription) LEFT JOIN tblSizing ON tblProjects.PID = tblSizing.PID

WHERE (((tblProjects.NLG)=Yes)) OR (((tblProjects.NLG)=Yes)) OR (((tblProjects.NLG)=Yes)) OR (((tblProjects.NLG)=Yes))

GROUP BY tblProjects.ProjectDisposition

HAVING (((tblProjects.ProjectDisposition)="Pending ITSC approval/prioritization")) OR (((tblProjects.ProjectDisposition)="Completed")) OR (((tblProjects.ProjectDisposition)="Cancelled")) OR (((tblProjects.ProjectDisposition)="On-Hold"));

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Question by:RalphyC
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Expert Comment

by:Terry Woods
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Might not be pretty, but this should work:
select ProjectDisposition, iif(isnull(SumOfCC_CostEstimate),0,SumOfCC_CostEstimate)

from (

SELECT tblProjects.ProjectDisposition,

       Sum(tblSizing.CC_CostEstimate) AS SumOfCC_CostEstimate

FROM tblProjects 

     LEFT JOIN tLUProjectStatus ON tblProjects.ProjectDisposition = tLUProjectStatus.DispositionDescription

     LEFT JOIN tblSizing ON tblProjects.PID = tblSizing.PID

WHERE tblProjects.NLG=Yes

GROUP BY tblProjects.ProjectDisposition

HAVING (tblProjects.ProjectDisposition)="Pending ITSC approval/prioritization"

    OR (tblProjects.ProjectDisposition)="Completed"

    OR (tblProjects.ProjectDisposition)="Cancelled"

    OR (tblProjects.ProjectDisposition)="On-Hold"

)

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Expert Comment

by:Terry Woods
Comment Utility
Or slightly better:
select ProjectDisposition, iif(isnull(SumOfCC_CostEstimate),0,SumOfCC_CostEstimate)

from (

SELECT tblProjects.ProjectDisposition,

       Sum(tblSizing.CC_CostEstimate) AS SumOfCC_CostEstimate

FROM tblProjects 

     LEFT JOIN tLUProjectStatus ON tblProjects.ProjectDisposition = tLUProjectStatus.DispositionDescription

     LEFT JOIN tblSizing ON tblProjects.PID = tblSizing.PID

WHERE tblProjects.NLG=Yes

    and ( (tblProjects.ProjectDisposition)="Pending ITSC approval/prioritization"

          OR (tblProjects.ProjectDisposition)="Completed"

          OR (tblProjects.ProjectDisposition)="Cancelled"

          OR (tblProjects.ProjectDisposition)="On-Hold"

        )

GROUP BY tblProjects.ProjectDisposition

)

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Expert Comment

by:jfmador
Comment Utility
If I understand your problem you do have a row in your tblProjects for the On-Hold, but you don't have any data in tblSizing, so the sum return you null?

If you get a null value, simply add a coalesce in your sum : Sum(COALESCE(tblSizing.CC_CostEstimate,0)) then if you get null for the tblSizing.CC_CostEstimate it will be replace by 0 then the sum will give you 0
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Expert Comment

by:jfmador
Comment Utility
Forget about my coalesce it didn't exists under access, terry is right you should use IIF and ISNULL

but I would suggest
SELECT tblProjects.ProjectDisposition,

Sum(IIF(ISNULL(tblSizing.CC_CostEstimate),0,tblSizing.CC_CostEstimate)) AS SumOfCC_CostEstimate

FROM (tblProjects 

     LEFT JOIN tLUProjectStatus ON tblProjects.ProjectDisposition = tLUProjectStatus.DispositionDescription)

     LEFT JOIN tblSizing ON tblProjects.PID = tblSizing.PID

WHERE tblProjects.NLG=Yes

GROUP BY tblProjects.ProjectDisposition

HAVING (tblProjects.ProjectDisposition)="Pending ITSC approval/prioritization"

    OR (tblProjects.ProjectDisposition)="Completed"

    OR (tblProjects.ProjectDisposition)="Cancelled"

    OR (tblProjects.ProjectDisposition)="On-Hold"

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Expert Comment

by:Terry Woods
Comment Utility
Was just about to suggest that myself, thanks to your first suggestion! :-)
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Expert Comment

by:jfmador
Comment Utility
Yeah I really like COALESCE, I never know how to prononce it and what it really means, Is it a real word? enyway it is a neat function.

sorry i'm french :)
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Author Comment

by:RalphyC
Comment Utility
jfmador

Using your last example, I am still getting only 3 rows returned. To make this clear, tblprojects does not have any records that match  (ProjectDisposition="On-Hold" and tblProjects.NLG=Yes). Table tblSizing is only used for purpose of extracting the CC_CostEstimate if it has matching PID from table tblProjects, and it is a 1 to 1 relationship with tblProjects. Please advise.
ProjectDisposition                          SumOfCC_CostEstimate
Cancelled                                                128000
Completed                                                 30000
Pending ITSC approval/prioritization      130000
On-Hold                                                   0 ' This is still missing
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Expert Comment

by:jfmador
Comment Utility
ok then you need a table with a row containing ProjectDisposition = "On-Hold"

you can use the same table twice to do it
SELECT tblProjects.ProjectDisposition, IIF(ISNULL(SumOfCC_CostEstimate),0,SumOfCC_CostEstimate) 

FROM tblProjects LEFT JOIN (

SELECT tblProjects.ProjectDisposition,

Sum(tblSizing.CC_CostEstimate) AS SumOfCC_CostEstimate

FROM (tblProjects 

     LEFT JOIN tLUProjectStatus ON tblProjects.ProjectDisposition = tLUProjectStatus.DispositionDescription)

     LEFT JOIN tblSizing ON tblProjects.PID = tblSizing.PID

WHERE tblProjects.NLG=Yes

GROUP BY tblProjects.ProjectDisposition

) t on tblProjects.ProjectDisposition = t.ProjectDisposition

WHERE (tblProjects.ProjectDisposition) = "Pending ITSC approval/prioritization"

    OR (tblProjects.ProjectDisposition)="Completed"

    OR (tblProjects.ProjectDisposition)="Cancelled"

    OR (tblProjects.ProjectDisposition)="On-Hold" 

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Author Comment

by:RalphyC
Comment Utility
This works, but it totals all records from table projects, regardelss of the tblProjects.NLG=Yes. If I add this to the criteria tblProjects.NLG=Yes, the On-Hold ), no longer appears.
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Author Comment

by:RalphyC
Comment Utility
Actually all now I need to so is display the distinct records, since they are repeating well over 100 times.
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Accepted Solution

by:
Terry Woods earned 500 total points
Comment Utility
I think jfmador's initial suggestion for the query is ok, as long as the filters in the "having" section are shifted to the "where" section
SELECT tblProjects.ProjectDisposition,

Sum(IIF(ISNULL(tblSizing.CC_CostEstimate),0,tblSizing.CC_CostEstimate)) AS SumOfCC_CostEstimate

FROM (tblProjects 

     LEFT JOIN tLUProjectStatus ON tblProjects.ProjectDisposition = tLUProjectStatus.DispositionDescription)

     LEFT JOIN tblSizing ON tblProjects.PID = tblSizing.PID

WHERE tblProjects.NLG=Yes

  and ( (tblProjects.ProjectDisposition)="Pending ITSC approval/prioritization"

        OR (tblProjects.ProjectDisposition)="Completed"

        OR (tblProjects.ProjectDisposition)="Cancelled"

        OR (tblProjects.ProjectDisposition)="On-Hold"

      )

GROUP BY tblProjects.ProjectDisposition

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Author Comment

by:RalphyC
Comment Utility
Got it, just add DISTINCT and it will do the trick.
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LVL 35

Expert Comment

by:Terry Woods
Comment Utility
I think jfmador deserves some points - if you post a request to reopen the question in the community support zone with the url of this question, they will reopen it so you can split the points.
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