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What happened to RANGES?

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  • What happened to RANGES?

    Remember the old days of Alpha4. You could creat a range (Filter) of records in a database. I need to do that now and cant figure out how. What I have is an inventory table with the inventory items of 2 differnt locations combined into one table. Both locations have both same and differnt items. Hoiw can I build a filter or range so that the end user sees only the records of one or the other and not both?

  • #2
    RE: What happened to RANGES?

    The Range is still there, it's just set up a bit diffenerntly and no called a Range. When you define the filter, use the Genie. Look at the options for the fields you want to use. When needed, variables will automatically be created.

    Let us know if you need more help.

    kenn
    TYVM :) kenn

    Knowing what you can achieve will not become reality until you imagine and explore.

    Comment


    • #3
      RE: What happened to RANGES?

      Ken

      Actually, ranges are still available in xbasic. They are rarely used and usually replaced by queries. The only advantage to a range is that it will return a sub-set of an existing index and is therefore dynamic. In effect, it is essentially the same as a filtered index that can be created and cleared with xbasic. A query is static and doesn't show changes until it is refreshed.

      Ranges are covered in the xbasic manual under tbl.range_add() and tbl.range_drop()

      Jerry

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      • #4
        RE: What happened to RANGES?

        Ranges were still available manually in browses and through Xbasic. Because the Range looks into the existing index listings to request its records the computer doesn't read and sort through all the records like it does when it creates a Query. This can be an advantage if the user is sitting across a network from a large table since the Range only reads a tiny portion of the records and causes less work for the computer network.

        Ranges are less flexible than Queries but can be very handy in large or networked reports where performance is important.

        To run a report with a range you have to eliminate any of the embedded or preassigned query functions and tell Alpha to run the report with no query or filtering. It's a bit tedious but you can collect the users range specification with Xbasic, start the report and assign the Range values in Xbasic just after the report starts to run.

        Dave

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        • #5
          RE: What happened to RANGES?

          Jerry - David,

          Thanks for your comments. I agree that a range is still available via xbasic. I did not mean to imply that the Genie was the ONLY place a range could be created. However, in the context of Fred's question, I believe he was referring to what took the place of the Range as used in Alpha 4.

          Many users of A5v4 are very familiar with using xbasic to create a range. However, many new users will not, if ever, use xbasic directly to create or clear a Range. They need to know how to use the Genie to create a range via a filter or a query. The range, along with other Alpha tasks, has taken on a new look and combined with other Alpha features.

          kenn
          TYVM :) kenn

          Knowing what you can achieve will not become reality until you imagine and explore.

          Comment

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