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How to reference the field name of the table in xbasic

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  • How to reference the field name of the table in xbasic

    Dear All,

    My question is,

    I have 2 tables (table A, and table B.) with comprises of fields as follows
    TABLE A.
    1. Staffid Character
    2. January Numeric
    3. February Numeric
    13.December Numeric

    TABLE B.
    1. Staffid Character
    2. TransactionDate Date
    3. Amount Numeric

    I read the data from table B. and convert "Transactiondate" to character by using cmonth(,)when I get the the month name I would like to update the table A. according to the month name (Jan feb mar.....)

    Staffid TransactionDate Amount
    00001 22/06/2010 50,000.00

    So Cmonth(TransactionDate) will return the value "June" then I will update table A field name "june" with amount from table B. I can do by using case command but I think it should have the other way to shorten the code than I think.

    If someone can help please or if there are previous message like this please help because I try to search but I can't.


  • #2
    Re: How to reference the field name of the table in xbasic

    I am curious as to why you would want to store this as it would basically be redundant data....a set created with Table A as Parent and Table B as child, using a One-to-One relationship (if I understood correctly) and StaffID as the link.

    Maybe there is another purpose I am unaware of, but if this is for display or report purposes then I think a set is more appropriate (and normalized).

    EDIT LATER: If there are going to be more than one transaction (probable), then maybe a compound linkage using the StaffID and the months' names would work....

    EDIT EVEN LATER: If this is something that is deemed necessary, then an update operation could be used utilizing your months as conditions and StaffID s as links.
    It is only when we forget all our learning that we begin to know.
    It's not what you look at that matters, it's what you see.
    Henry David Thoreau


    • #3
      Re: How to reference the field name of the table in xbasic

      I made some edits I realized that perhaps were done as you were reading the initial reply of mine....wanted to point that out as well as to answer your original question that is in the thread title.

      Using table methods, you have to first open or "get" the table.....if the table is already open, then table.get("your_table_name") will suffice most times. Otherwise use"your_table_name"). a bit of psudocode below that may get you there in your original thinking.

      dim tbl_1 as p
      tbl_1 ="Table_A")
      dim tbl_2 as p
      tbl_2  ="Table_B")
        case Cmonth(tbl_2.TransactionDate)="January"
          tbl_1.January = tbl_2.Amount
          .and so on as you indicated for each month
      end select
      You would be looping through the table as well....using

      while .not. tbl_1.fetch_eof()

      'select/end select code in prior post put here

      end while

      But as I said....I'd try an update (or posting) operation instead of the loop and let the genie do the heavy lifting.
      Last edited by MikeC; 06-14-2010, 02:27 AM.
      It is only when we forget all our learning that we begin to know.
      It's not what you look at that matters, it's what you see.
      Henry David Thoreau


      • #4
        Re: How to reference the field name of the table in xbasic

        Mike, I think Panya is trying to not use the select case construct

        Panya, check out the eval() function

        Dim tbl_A as P
        Dim tbl_B as P
        What ever code you have to get the correct records...
        eval("tbl_a."+Cmonth(tbl_B.TransactionDate) = tbl_B.Amount
        Tim Kiebert
        Eagle Creek Citrus
        A complex system that does not work is invariably found to have evolved from a simpler system that worked just fine.


        • #5
          Re: How to reference the field name of the table in xbasic


          Thank a lot (both Mike & Tim), your answers have valued for me, especially eval() function, it's the thing that I want but I don't know before until you suggest me how to use.

          Thank again for your kind.