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Reports can be based on sets?

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    #46
    Re: Reports can be based on sets?

    Originally posted by SNusa View Post
    Forgive me for "jumping in here" but how would/could one code to use the function scanning() within X-basic code, as depicted in the wiki as a "function" and not as a "filter?"
    Because a filter needs have a result that is true or false - and that is exactly the result of the scanning() function.
    Originally posted by SNusa View Post

    SCANNING() returns .T. (TRUE) if the current composite record buffer includes data from Table_Name ; otherwise, it returns .F. (FALSE).

    To determine if a there is a matching customer for a particular invoice record, use the expression:
    scanning("CUSTOMER") -> .F. (FALSE) for invoice records I103 and I105


    I'm guessing that you could add the code: vl_RecordExists = scanning("ChildTable_Name") on a "filtered set displayed on a layout, or possibly when looping through individual records in a set? (I wish they had provided a more complete & meaningful code example in the wiki.)

    ....And then one true/false value gets returned which is based on all the filtered parent records as a whole?
    Actually you are filtering the child records. The parent records are always there.

    Look at the browse example that I pasted earlier or build your own browse on your own set. The set should have multiple one to many relationships and look at the parent and each of the children....
    Al Buchholz
    Bookwood Systems, LTD
    Weekly QReportBuilder Webinars Thursday 1 pm CST

    Occam's Razor - KISS
    Normalize till it hurts - De-normalize till it works.
    Advice offered and questions asked in the spirit of learning how to fish is better than someone giving you a fish.
    When we triage a problem it is much easier to read sample systems than to read a mind.
    "Make it as simple as possible, but not simpler."
    Albert Einstein

    http://www.iadn.com/images/media/iadn_member.png

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      #47
      Re: Reports can be based on sets?

      My "2 Cents":

      With Stan's example: If you set the filter of the main report (not the sub reports) to: SCANNING("invoices") .or. SCANNING("payments") (and clear out the scanning() filters on the sub reports) you get rid of all the erroneous empty records (exclude all customers without transaction detail) at the parent level too!

      The scanning() function is very useful for clearing out erroneous data from reports! ~Thanks everyone!
      Last edited by SNusa; 04-13-2012, 08:06 PM.
      Robert T. ~ "I enjoy manipulating data... just not my data."
      It's all about the "framework." (I suppose an "a5-induced" hard drive crash is now in order?)
      RELOADED: My current posting activity here merely represents a "Momentary Lapse Of Reason."

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        #48
        Re: Reports can be based on sets?

        thanx

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