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Working with till transactions

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  • Working with till transactions

    Hi All,

    New to Alpha 5 and SQL, coming from Clarion.

    I have decided to transfer our desktop apps to a unified web app and am using SQL Server 2012 Express. It is for an in-house app that won't have huge numbers of records.

    The way we do our (cash register) till at the moment is to set a main transaction with a total value, and allow transactions against that value until the total has been reached and then main (header) transaction is marked as completed.

    I have two files ... TillHeader and LineItems.

    The pertinent fields in the TillHeader are :

    Transaction amount ... the amount that the total for the transaction is for.
    TotalVATPaid ... the total amount of VAT paid for a transaction. (Line items can have differing amounts of VAT for each line)
    ItemCompleted ... A logical (int) field
    DateOfCompletion ... The date that the transaction was marked completed
    BalanceDue ... The amount remaining ... the transaction amount - the LineItems against this TillHeader.

    The pertinent fields in the LineItems are :

    ItemAmount ... the amount of the item
    Quantity ... the number of the items
    VATApplied ... a percentage value ... currently either 0, 12.5 or 23, but this is potentially variable
    LineTotal ... a computed field in the SQL database (Quantity*ItemAmount)
    VATPaid ... a computed field in the SQL database (Quantity*ItemAmount*VATApplied)/100

    What I want to do is to manage the TillHeader automatically ...

    A till header is created ... Say €100
    Each time a LineItem is created/modified, I want to post back to the TillHeader to update the balance remaining, VAT paid etc and when the total is paid, to set the date completed and to mark the transaction completed.

    Should this be a trigger of some kind or computed fields or am I best handling this through Alpha 5 on the client side?

    Thanks in advance for any help


  • #2
    Re: Working with till transactions

    Probably best to do this on the sql side.
    AlphaBase Solutions, LLC


    • #3
      Re: Working with till transactions

      Hi Peter,

      Bearing in mind I am pretty new to SQL, should I be looking to use a trigger or a calculated field or ...?

      In Clarion, I used the proprietary flat file database, so this would have been handled with code on the desktop.




      • #4
        Re: Working with till transactions

        Hi Phil
        I've re-read your explanation many times. Maybe you would have better luck explaining - more in principle than in detail.
        How do you complete a till header total before you've added the items that make it up? and then why mark off the items until they reach the header amount.


        • #5
          Re: Working with till transactions

          Hi Ray,

          Patients have a total their bill will amount to. Say €100. This will be the till header record.

          This will be then paid ... either in total, or in more than one payment. They may pay the €100 up front, or may leave a deposit and pay the balance later, or may pay off on an agreed schedule. These payments will be the line items.

          Doing it this way allows for receipts to be issued for each payment and a history of when payments were made.

          Does that help clarify? Can you suggest a better method?




          • #6
            Re: Working with till transactions

            I am late to the party and am not sure if this is still unresolved. There are many ways to do this i.e. different combinations of triggers, views, functions and procedures. See the post below for one method.



            • #7
              Re: Working with till transactions

              Hi Christopher,

              I'll have a look when I get back to my dev machine this evening. Thanks for joining the party :-)



              • #8
                Re: Working with till transactions

                Hi Christopher,

                I will mess around with this over the weekend, but I think this is exactly the help I needed. Thanks.

                Hopefully I can get back to you if more confusion sets in.