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Post Data Rule - limitations

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  • Post Data Rule - limitations

    I have two databases currently not linked (but they could be linked in a set).
    The first database (orders)has "itemcode" and "quantity". "quantity is not user entered but the summary result of a third database.
    The second database (inventory) has "itemcode", "partno", "stock" and "minimum level". There can be more than one record with the same "itemcode" but with different "partno".

    PROBLEM: Where each of the "itemcode" in the second database matches the "itemcode" in the first, I need to reduce the "stock" data by the "quantity" data from the first database.

    ALPHA 4 MANUAL Notes: tell me
    1) You cannot post to a child database linked through a one-to-many link, and,
    2) When posting to an external database only the first matching record is updated.


  • #2
    RE: Post Data Rule - limitations

    If the Inventory db has several records with the same itemcode, is "Stock" to be reduced by the same "Quantity" in each and all of the records, or is the "Quantity" reduction to be divided up among the multi records?



    • #3
      RE: Post Data Rule - limitations

      Each record that matches "itemcode" is to be reduced by "quantity" from the first database.
      Basically we produce an item "itemcode" which is made up of quantity one of several parts "partno".
      I didn't mention it earlier not wanting to confuse the situation, but one of the parts "partno" is duplicated in a number of the items "itemcode".

      Thanks for your help and interest.
      Regards Ian


      • #4
        RE: Post Data Rule - limitations

        I believe your problem would be solved by creating a set using an index based upon your item code. However, your second database (Inventory) would be the primary database, and Orders would be linked to it (a "many to one" set) via an ITEMCODE index.

        You could then set up a global update to subtract the value of "Quantity" in the ORDERS db from "Stock" in the primary database. Every matching "itemcode" record would have the quantity amount subtracted.

        I have created a sample set to illustrate how it would work ... however, to illustrate it I added a field in the Inventry db called "result" to show you that it works. I hope I can get the backedup set to attach to this reply.



        • #5
          RE: Post Data Rule - limitations

          Many thanks, you have solved my problem. I had previously tried a set but used the wrong primary database. Appreciate your efforts in getting this resolved.
          Ian Stewart