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Update query

Posted on 2011-02-22
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Last Modified: 2012-05-11
I have the folllowing table named TechList
with the following sample data

TotLaborPartsAll    TotLaborPartsTA   TotLaborPartsXTR  PartsLabor
3324.73                   319.92                 1                              0  
400                          500                       2                             0



I am trying to write a query that will update partsLabor with the following

If TotLaborPartsALL > TotLaborPArtsTA +  TotLaborPartsXTR then totLaborPartsall - (totlaborPartsta - totlaborpartsxtr) else 0

Using the sample data above

 partsLabor in the first row should be set to 3003.81
(3324.73 - (319.92 + 1))

partsLabor in the second row should be set to 0 since TotLaborPartsALL is not greater than TotLaborPArtsTA +  TotLaborPartsXTR



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Question by:johnnyg123
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8 Comments
 
LVL 4

Expert Comment

by:Alex Matzinger
ID: 34954649
Update table TechList set partsLabor=
     CASE
          WHEN (TotLaborPartsALL > TotLaborPArtsTA +  TotLaborPartsXTR)
                    THEN totLaborPartsall - (totlaborPartsta - totlaborpartsxtr)
          ELSE 0
      END
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Accepted Solution

by:
Rey Obrero (Capricorn1) earned 500 total points
ID: 34954670
test this

update TechList
set PartsLabor=iif([TotLaborPartsALL] > (nz([TotLaborPArtsTA] +  nz([TotLaborPartsXTR])), [TotLaborPartsALL]-(nz([TotLaborPArtsTA] - nz([TotLaborPartsXTR])),0)
0
 
LVL 4

Expert Comment

by:Alex Matzinger
ID: 34954671
sorry, the first line should be

Update TechList set partsLabor =
0
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LVL 51

Expert Comment

by:HainKurt
ID: 34954704
Update table TechList
set
partsLabor=IIf(TotLaborPartsALL > TotLaborPArtsTA +  TotLaborPartsXTR, totLaborPartsall - (totlaborPartsta - totlaborpartsxtr),0)

assuming all have numeric values, if some may have null values, use NZ(col, 0) for all columns that may have null values like

Update table TechList
set
partsLabor=IIf(NZ(TotLaborPartsALL,0) > NZ(TotLaborPArtsTA,0) + NZ(TotLaborPartsXTR,0), NZ(totLaborPartsall,0) - (NZ(totlaborPartsta,0) - NZ(totlaborpartsxtr,0)),0)
0
 

Author Comment

by:johnnyg123
ID: 34954883
got the following to work


UPDATE TechList SET PartsLabor = IIf(nz(TotLaborPartsALL,0)>nz(TotLaborPArtsTA,0)+nz(TotLaborPartsXTR,0),nz(totLaborPartsall,0)-(nz(totlaborPartsta,0)+nz(totlaborpartsxtr,0)),0);
0
 
LVL 51

Expert Comment

by:HainKurt
ID: 34955086
the one worked is the one I posted but you did not give me any points :(
0
 
LVL 120

Expert Comment

by:Rey Obrero (Capricorn1)
ID: 34955151
HainKurt,
sorry but, the query you posted will give you an error.
0
 
LVL 51

Expert Comment

by:HainKurt
ID: 34957512
:) I forgot to remove keyword "table" from the query :)
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