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SQL UPDATE query based on calculations

Posted on 2011-09-13
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Last Modified: 2012-05-12
Part of the criteria for this update query is a calculation.  Currently this figure 'liTotalCost' is made just once.  This number needs to be calculated for each record.  How do I integrate these calculations into the query?  I am working with VB6, Access 2003.  Thank you for your help.  
Dim strSQL5 As String
Dim liTotalCost As Long
Dim liBalMD As Long
Dim liEstMD As Long
Dim liActMD As Long

liBalMD = (CDbl([A]) + CDbl([B]) + CDbl([C]) 
liEstMD = (CDbl([X]) + CDbl([Y]) + CDbl([Z]) 

If liBalMD < 0 Then
    liActMD = (liEstMD + liBalMD)
Else
    liActMD = liEstMD
End If
liTotalCost = (CDbl([ActMDCost]) - liActMD)

strSQL5 = "Update DISTINCTROW [ProjOverview] o Left Join (SELECT ProjID, SUM(Amount) AS SumOfAmount From JONProjJoins GROUP BY ProjID) s ON s.ProjID = o.IDNmbr Set [Status] = 'Complete', [Complete] = Now , [TotalServicesAct] = [TotalServicesEst] Where (([Status] = 'Funded') AND (" & liTotalCost & " > Nz(s.SumOfAmount, 0))) OR (([Status] = 'Funded') AND (" & liTotalCost & ") > ([TotalEstimate]))"
DoCmd.RunSQL strSQL5

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Question by:KimD2
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11 Comments
 
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Expert Comment

by:GeoffHarper
Comment Utility
It looks OK to me, except for an extra paren.  It should be:
...Where (([Status] = 'Funded') AND (" & liTotalCost & " > Nz(s.SumOfAmount, 0)) OR (([Status] = 'Funded') AND (" & liTotalCost & ") > ([TotalEstimate]))"
DoCmd.RunSQL strSQL5

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Author Comment

by:KimD2
Comment Utility
"liTotalCost" needs to be re-calculated for each record.  Is it being recalculated when written like this?  I am new to this and not sure whay the query is not working.  Thank you for the paren note.  Unfortunately that was not it.  I do not receive an error - just the records that should be updated are not.    I appreciate your input.
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Expert Comment

by:Brook Braswell
Comment Utility
Put your Sum query in the Where clause

strSQL5 = "Update DISTINCTROW [ProjOverview] o " & _
             "Set [Status] = 'Complete', " & _
               "[Complete] = Now , " & _
       "[TotalServicesAct] = [TotalServicesEst] " & _
           "Where (([Status] = 'Funded') " & _
             "AND (" & liTotalCost & " > Nz(( SELECT SUM(Amount) AS SumOfAmount " & _
                     "From JONProjJoins s " & _
                    "where s.ProjID = o.IDNmbr " & _
                    "GROUP BY ProjID), 0))) OR (([Status] = 'Funded') AND (" & liTotalCost & ") > ([TotalEstimate]))"
DoCmd.RunSQL strSQL5
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Author Comment

by:KimD2
Comment Utility
Thank you but it is still not updating.  Do you have any other suggestions?  
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LVL 14

Expert Comment

by:Brook Braswell
Comment Utility
In what way is it not updating ?  Are you getting an error when you run the Update Query ?
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Author Comment

by:KimD2
Comment Utility
I do not get any errors.  It seems to run but the fields are not updated.  In the records where the criteria is met the fields (Status, Date.. ) remain unchanged.
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Expert Comment

by:Brook Braswell
Comment Utility
ok, check your where clause, step through the code and see if the where returns data.

Example:

Open a SQL editor:


 
Select * from [ProjOverview] o
Where ( ( [Status] = 'Funded') 
    AND ( 1000 > Nz(
                     ( SELECT SUM(Amount) AS SumOfAmount 
                        From JONProjJoins s 
                       where s.ProjID = o.IDNmbr 
                       GROUP BY s.ProjID), 0
                     )
                   )
             ) OR ( [Status] = 'Funded' AND 1000 > [TotalEstimate])

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Accepted Solution

by:
Brook Braswell earned 500 total points
Comment Utility
The more I look at this the more I want to remove some of these parenthesis and help you clean it up  :)



Dim strSQL5 As String
Dim SumSql  As string
Dim liTotalCost As Long
Dim liBalMD As Long
Dim liEstMD As Long
Dim liActMD As Long

liBalMD = (CDbl([A]) + CDbl([B]) + CDbl([C]) 
liEstMD = (CDbl([X]) + CDbl([Y]) + CDbl([Z]) 

If liBalMD < 0 Then
    liActMD = (liEstMD + liBalMD)
Else
    liActMD = liEstMD
End If
liTotalCost = (CDbl([ActMDCost]) - liActMD)

SumSql = "SELECT SUM(Amount) AS SumOfAmount " & _
           "FROM JONProjJoins s " & _
          "WHERE s.ProjID = o.IDNmbr " & _
          "GROUP BY s.ProjID"

strSQL5 = "UPDATE [ProjOverview] o " & _
             "SET [Status] = 'Complete', " & _
                 "[Complete] = Now , " & _
                 "[TotalServicesAct] = [TotalServicesEst] " & _
           "WHERE [Status] = 'Funded' " & _
             "AND (" & liTotalCost & " > Nz(" & SumSql & ", 0 ) " & _
              " OR " & liTotalCost & " > [TotalEstimate] )"
DoCmd.RunSQL strSQL5

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Author Comment

by:KimD2
Comment Utility
Ok -- the where does return data.  
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Expert Comment

by:Brook Braswell
Comment Utility
Make sure to place parens around the SumSql
SumSql = "( SELECT SUM(Amount) AS SumOfAmount " & _
           "FROM JONProjJoins s " & _
          "WHERE s.ProjID = o.IDNmbr " & _
          "GROUP BY s.ProjID )"

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Author Closing Comment

by:KimD2
Comment Utility
Thank you!   I revisited the data --- good data combined with your code worked perfectly.   Thank you also for the clean formatting.  It is certainly much clearer and easier to read.
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