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  • Query

    Is there a way to query a form or report based on a calculated field?

    I have read Chapter 3, Ordering and Selecting Records.

  • #2
    RE: Query


    Pls clarify.

    Are you talking about a field in your table that's not 'user entered, but is 'calculated'...


    Are you talking about a field you've created on the form for display purposes, which is not actually stored in the table? (Some of us have begun calling these 'display calc fields' to distinguish them from the former, but the terminology has not been universally accepted.)

    -- tom


    • #3
      RE: Query

      It's your first question. A calculated field on a form whose result is the sum of two other fields.


      • #4
        RE: Query

        Upon rereading your reply I believe what I have is a "display calc field", on a form. Confusing!


        • #5
          RE: Query


          I don't think query by form or query by table can be used with a 'display calc field' on a form. Instead, you have to define the query to include the formula or expression inside the display calc field.

          Assume you have two fields in your record:
          Quantity (numeric, zero decimals)
          UnitCost (numeric, 2 decimals)

          Assume also you have a display calc field on the form,
          called ExtendedCost, and it uses a simple expression:
          Quantity * UnitCost

          If you wanted to find all records where ExtendedCost was greater than $100.00, you'd be tempted to use QBF
          and search for ExtendedCost > 100.00. Won't work.

          Instead you have to do something like this:

          (Quantity * UnitCost) > 100.00

          using query by table or the query genie.

          See the difference?

          -- tom


          • #6
            RE: Query

            CORRECTION !

            James, guess I'm having a senior moment!

            I went back to my working example and found that when the new display calc field was dropped on the form, Alpha Five disabled it without telling me. (This is done by setting a property of the display calc field on the form). If this happened to you, just remove the check mark for 'disable' property on the display calc field on your form. QBF will then work with it just fine.

            Ignore the previous post. It's wrong.

            -- tom


            • #7
              RE: Query

              All of my momemts are senior!
              Another question in this regard. Is it possible to query a form or report on a field contained in a child table of a set? Also, this is a calculated field.


              • #8
                RE: Query

                In version 4 of Alpha Five you can't find matching parent table records by querying their children, unless you use the flattenquery() function. Many would find it easier to design an inverted set, and then run the query against the original child table (now primary).

                Regardless, queries are not run against the form or against a report. They are always run against a table or a set of tables, linked one to one.

                In Version 5 I'm told that you can more easily query link child table records...

                -- tom


                • #9
                  RE: Query

                  tom, thanks for your help in this regard.