Question

MS Access: Update Query with sum of two fields.

Asked by: HackLife

Here are the two tables:


The first table is "Customer File"

ID Number      First Name      Last Name      Account Balance
1              JOHN         CARTER   $0.00
2              CHRIS       HARRIS     $0.00
3              BRANDY    HOPKINS   $0.00
4              MYA         LONG         $0.00
5              DANIEL     WILLIAMS  $0.00
6              FAY         DIXON        $0.00
7              ANN         YOUNG       $0.00
8              NORMA     JACKSON   $0.00
9              MARK       RED           $0.00
10      MICHEAL      WAYNE      $0.00



The Second Table is "Transaction File"

Transaction Number      ID Number      Product Description      Payment Amount
156                           2              BOOTS                      $30.00
203                           4              COVER                      $52.32
212                           2              SOCKS                      $52.65
232                           1              TABLE                       $65.59
298                           8              COAT                        $5.98
362                           9              DRESS                      $54.52
471                           7              T-SHIRT                    $9.99
545                           3              CHAIRS                     $14.95
568                           10            SKIRT                       $16.75
587                           6              JEANS                      $51.47
622                           1              SHOES                      $11.02
654                           5               JACKET                      $22.88



I have a query "Total Amount:"

ID Number      Last Name      SumOfPaymentAmount
1              CARTER                $76.61
2              HARRIS                $82.65
3              HOPKINS               $14.95
4              LONG                    $52.32
5              WILLIAMS              $22.88
6              DIXON                   $51.47
7              YOUNG                  $9.99
8              JACKSON              $5.98
9              RED                       $54.52
10             WAYNE                $16.75



I need the "Account Balance" field in "Customer File" table updated with the sum of fields related to the customer as show in the "Total Amount" Query. I have done access for 3 years and I still can't figure this out! Help!

I know that you need to use an update query somehow, but I don't know how.

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Asked On
2005-02-03 at 11:40:09ID21300849
Tags

access

,

sum

,

query

,

update

,

fields

Topic

Databases Miscellaneous

Participating Experts
4
Points
500
Comments
5

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Answers

 

by: mcmonapPosted on 2005-02-03 at 13:01:43ID: 13219285

Hi HackLife,

How bizarre!  After much frustration resorted to the web and found this - it would seem that it is a design limitation of access that you cannot do what you want in a single transaction:
http://support.microsoft.com/default.aspx?scid=kb;en-us;116142

 

by: raghx_2000Posted on 2005-02-03 at 20:21:07ID: 13222360

try cascase update

 

by: VMontalvaoPosted on 2005-02-04 at 02:59:28ID: 13224217

Try write directly the SQL statement:

UPDATE Customer
SET AccBalance = (SELECT SumOfPaymentAmount FROM TotalAmount
                            WHERE TotalAmount.ID = Customer.ID)

 

by: HackLifePosted on 2005-02-04 at 10:29:32ID: 13228415

I decided just to make a button to do what I need. It's the only way I know how.

    ' Initialize database variables
    Dim strQuery As String
    Dim rsResult As ADODB.Recordset
   
    ' Clear current database
    strQuery = "SELECT SumOfPaymentAmount FROM [Total Amount] WHERE [ID Number] = " & Customer_File_OrderID
    Set rsResult = CurrentProject.Connection.Execute(strQuery)
   
    Account_Balance = rsResult(0)

 

by: cactus_dataPosted on 2005-02-04 at 11:05:22ID: 13228766

Don't use the query but sum the order lines one by one:

  UPDATE
    tblCustomer
  INNER JOIN
    tblTransaction ON
      (tblCustomer.ID = tblTransaction.ID)
  SET
    tblCustomer.Balance = tblCustomer.Balance + tblTransaction.Payment;

Wrap it in a transaction for improved speed.

/gustav

20120131-EE-VQP-002

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