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Database Lookup

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    Database Lookup

    I want to perform a lookup to a "Dependent Database" to bring back and display the dependent name on a Form. I want to use two fields in the lookup, both numeric.

    Field 1) is SocialSecurityNumber Numeric 9 0 decimals
    Field 2) is DependentNumber Numeric 5 0 decimals

    I appreciate your help!

    Thanks in advance,
    Edwin Diaz

    #2
    RE: Database Lookup

    Before you go any further, you might consider the advice

    - Unless you intend to use a series of digits in some calculation, the series should be considered a character string, not a number. This would apply to zip/postal codes, phone numbers, social security numbers, etc.
    There can be only one.

    Comment


      #3
      RE: Database Lookup

      Hi Edwin:

      Take Stan's advice. It will save you headaches down the road. Set linking fields should definitely be character even if they are going to contain numeric data. Voice of experience speaking here. Got bit in the butt deep in a project before I found this board and the repeated advice about using character fields unless you are going to perform calculations.

      As for your look up question, check Alpha's help. Click the index tab and type "lookup". You should find what you need there.

      Allen

      Comment


        #4
        RE: Database Lookup

        Thank you for your response. Maybe I'm not too clear, I can't imagine that in Alpha5 (forgetting about if the fields are numeric or alpha), I cannot do a lookup as follows:

        Get record where socialsecurity = 123456789 and
        dependentnumbr = 03

        That's what I'm trying to accomplish. I checked the Help but it is not too clear.

        Thanks.
        Edwin

        Comment


          #5
          RE: Database Lookup

          Hi Allen,

          Y is this a problem using numeric you don�t have to worry about leading 000000 this way and all the other trouble that comes with auto-incr field if set to chr?

          -Ray

          Comment


            #6
            RE: Database Lookup

            This is a data warehouse application where the data was downloaded from a mainframe application where the fields in question are numeric.
            Regardless, I would like to know if you can do a lookup in Alpha Five using a concatination of fields, in this case, SocialSecurityNumber and DependentNumber.

            Thank you.
            Edwin

            Comment


              #7
              RE: Database Lookup

              You can if you have an index built on the same concatenation expression.



              String = LOOKUPC( Match_Type as C, Key_Value as C, Lookup_Expression as C, Lookup_Table as C, Index_Name as C )



              Key_Value as C

              must match

              an entry in

              Index_Name as C
              There can be only one.

              Comment


                #8
                RE: Database Lookup

                And there's where the problem will arise.

                The only concatenation of

                socialsecurity = 123456789 and
                dependentnumbr = 03

                as numeric fields is

                123456789 + 03 for a value of 123456792

                how does that differ from

                123456788 + 04

                You will need to build an index on alltrim(str(socialsecurity)) -alltrim(str(dependentnumbr))

                and then lookup based on that expression as the key value. This would give you index entries like

                12345678903
                12345678804

                for the above instances..

                By the way, "dependentnumbr = 03"

                03 is not a number.
                There can be only one.

                Comment


                  #9
                  RE: Database Lookup

                  Thank you very much for your reply. I will try it when I get into the office next Tuesday. I will be out for the rest of the week and Monday.

                  Thanks again,
                  Edwin Diaz

                  Comment

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