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Reports and duplicate records

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  • Reports and duplicate records

    I have a table with many fields of demographic data (age, income, race, etc) and a unique id for each individual and each family. A record exists for each time a customer has an interaction (or 'event') with my client.

    I am using the tablecount() function in a report to count the number of individuals that a specific event was performed for, being sure not to count any individual more than once, even if they have had the same event 2 or more times.

    One way I have figured out to do this is by first marking the duplicate persons records. Then I can count the number of individual person record with this
    tablecount("r_csbg",".NOT.Marked()"+".AND."+"Person_ID <> ''")
    Now I would have to do the same thing if I want the number of individual family records. This seems very cumbersome. There must be a way of using tablecount filtering for duplicates in one field, or perhaps even a better way of doing this report.

    Any comments would be appreciated.


  • #2
    Re: Reports and duplicate records

    This is similar to the problem at post

    there are two possible solutions in that post that may do your job


    • #3
      Re: Reports and duplicate records

      Joe, I wonder if a "unique keys" index based on the concatenated field values of your customer id and event name fields would be equivalent, or maybe even faster?


      • #4
        Re: Reports and duplicate records


        How exactly do I return the value of the index on a report? For example, I created the following index in the table "r_csbg":

        Name: Undup_Per
        Order Expression: PERSON_ID
        Filter Expression: blank
        Direction: Ascending
        Include: Unique Only

        My understanding is that the value (or perhaps the Count) of this index would return the number of unique PERSON_ID's in the table. Is that correct? And if so, how do I then bring up this value in the report?



        • #5
          Re: Reports and duplicate records

          I was thinking of a user defined function that
          - opened the table
          - made the unique index primary
          - retrieved the record count
          - closed the table

          Here's an example I built in the interactive window based on a "unique only" index I created for the Invoice_items table.

          There are 42 unique products in the items table, even though there are 100 items records.

          t ="invoice_items")
          ndx = t.index_primary_put("prod_uni")
          = 42
          = 100
          The user defined function would be incorporated into a calc field expression in your report layout.