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  1. #1
    wendtb is offline Novice
    Windows 10 Access 2016
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    Database Buildout: Running Sum by Both GROUP and Transaction Date

    Hi everyone,

    I need your help and I am sure someone has answered this before, but I cannot seem to find it. I am trying to create a query to create a rolling sum of the balances of all "Type_of_Transaction" except for "Total Commitment" By Loan_ID and by Transaction_Date. I provided a snapshot below of the simple table but here is a written example as well. I really hope someone can help, I have been struggling for weeks and I am not as good as I thought.



    Basically I want to say 6600119 funded 9.75 M on September 26th and then on 4/20 paid down 154k for a balance of 9.596M and then funded another 100k for a balance as of 4/28 of 9.696M. Is there a way to calculate a running balance like that for each individual loan number? You would be a lifesaver.

    Click image for larger version. 

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    Thank you in advance!
    Brandon

  2. #2
    isladogs's Avatar
    isladogs is offline Very idle programmer
    Windows 10 Access 2010 32bit
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    Create a new aggregate query by clicking Totals in the design ribbon.
    Add loan id and type of transaction fields and note they will say group by in the totals row.
    Now add the amount field and change group by to sum using the dropdown.
    That's it. Run the query
    Colin (Mendip Data Systems): Website, email
    Try again. Fail again. Fail better.
    A
    sking for help isn't giving up. Its refusing to give up.

  3. #3
    wendtb is offline Novice
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    Hey Colin,

    This is not allowing me to do a running sum, I also want to include the running sum by date and exclude a certain type of transaction. Here is the SQL I have so far:

    SELECT Transactions.Loan_ID, Transactions.Type_of_Transaction, Sum(Transactions.Amount) AS SumOfAmount
    FROM Transactions
    WHERE (("Transaction Date">="Transaction Date"))
    GROUP BY Transactions.Loan_ID, Transactions.Type_of_Transaction
    HAVING (((Transactions.Type_of_Transaction)<>"Total Commitment"));

    The two things I cannot figure out are how to do the cumulative sum and by date. I included a snip from excel of how I want it to look in access.

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    THANK YOU SO MUCH FOR THE HELP!

  4. #4
    wendtb is offline Novice
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    Essentially I am trying to perform this formula in MS Access.

    Sum amounts if loan ids are equal, type of transaction does not equal Total Commitment, and I want to sum all transactions up to the current date of the transaction in that row (Cumulative sum).

  5. #5
    isladogs's Avatar
    isladogs is offline Very idle programmer
    Windows 10 Access 2010 32bit
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    Ah I see. Bit more complicated than it originally seemed to be
    Have you looked on allen browne's website? He may well have a solution.

    Failing that, suggest you upload some sample data for someone to play with
    Colin (Mendip Data Systems): Website, email
    Try again. Fail again. Fail better.
    A
    sking for help isn't giving up. Its refusing to give up.

  6. #6
    Ajax is offline VIP
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    I'm assuming your example has two Loan_ID's which coincidentally have the same transaction values

    I suggest the query you want is

    SELECT A.Loan_ID, A.Transaction_Date, A.Type_of_Transaction, sum(iif(B.Type_of_Transaction="TotalCommitment",0, B.Amount)) as Outstanding Balance
    FROM Transactions A INNER JOIN Transactions B ON A.Loan_ID =B.Loan_ID AND B.Transaction_Date<=A.Transaction Date
    GROUP BY A.Loan_ID, A.Type_of_Transaction, A.Type_of_Transaction
    ORDER BY A.Loan_ID, A.Transaction_Date

    Note this cannot be created in the query builder because it cannot create the join B.Transaction_Date<=A.Transaction Date

  7. #7
    wendtb is offline Novice
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    THANK YOU, WOW. I am so happy, cannot thank you enough. Is there anyway you can explain to me what the formula is doing? It seems like it is just joining the same table and creating an ALIAS for it?

    THANK YOU AGAIN AND AGAIN!

  8. #8
    Ajax is offline VIP
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    there is no formula as such, just done with joins

    you need to use an alias because you are referencing the same table twice and it joins on itself.

    The first alias (A) provides the 'reference' data, the second (B) provides the summed data 'filtered' by the join.

  9. #9
    wendtb is offline Novice
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    Got it, thank you again!

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