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Auto Increment using characters and numerals

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    Auto Increment using characters and numerals

    Hallo. I have a question. I am currently creating a database table that will have a record with an auto increment field rule. The problem is that I need the number to use the first 3 letters of the surname of a person and if there are 2 surnames that is the same that it numbers itself with the 3 letters and an added number 2 etc. Furthermore I will have several files for one person and will have a separate table for that. In the end I will need the numbers to look like this:
    Surname: Flemming
    FLE1/0001, FLE1/0002, FLE1/0003

    Person 2 Surname: Flemming
    FLE2/0001, FLE2/0002; FLE2/0003

    Thank You

    #2
    Re: Auto Increment using characters and numerals

    The problem is that I need the number to use the first 3 letters of the surname of a person and if there are 2 surnames that is the same that it numbers itself with the 3 letters and an added number 2 etc.
    You can't do that with Alpha's auto increment field rule. It simply increments the rightmost character.

    You can write your own field rule event code to do what you want. It would look at the current surname, count present instances, increment that count, and create the desired value.

    Attached is an example that increments a field (orggrant) based on the number of instances of another field (org). Basically what you are describing without the concatenation.
    Last edited by Stan Mathews; 06-29-2009, 08:38 AM.
    There can be only one.

    Comment


      #3
      Re: Auto Increment using characters and numerals

      Thanks Stan.

      Comment


        #4
        Re: Auto Increment using characters and numerals

        Hi Stan,

        I have studied a lot about Alpha lately and understand the situation with the auto increment field. I would just like to know how I will go about creating a field rule for the situation described in my previous post to then as you said, look at the instances of the surnames and then number them accordingly. I only need to be able to do this on the first field that will for example be: FLE1 and FLE2 as the second part (/001, /002) will be filled in from another table when I combine the 2 fields from the 2 tables using a field rule.

        Thanks

        Comment


          #5
          Re: Auto Increment using characters and numerals

          To fully understand how to create the process for you I would have to understand how you distinguish "persons".

          In the first thread you said...

          if there are 2 surnames that is the same that it numbers itself with the 3 letters and an added number 2 etc.
          How can you tell if there are two Flemmings with three records and not one Flemming with six records?

          It will be easiest if you attach a sample table here.
          There can be only one.

          Comment


            #6
            Re: Auto Increment using characters and numerals

            Hallo Stan,

            Sorry it is surnames. I am in the beginning stages and do not have any data in my database yet. I will have a customer table that will have a Customer ID and then a Code field that will number that specific customer with Surname Flemming as FLE1 and the second Flemming as FLE2.

            I will also have a second table that will have other records for each customer. When I then add a record for FLE1 in the other table the two tables will create a number in the second table as FLE1/0001 and the second record as FLE1/0002. This will happen because of my field rule that I will create for the code field in the 2nd table.

            My problem is to ensure that when I create the second Flemming in the customer table that it will recognize the fact that there is a first Flemming and then create the second Flemming as FLE2.

            Hope this explains it better.

            Comment


              #7
              Re: Auto Increment using characters and numerals

              Download my attachment and unzip it to your database directory (assuming you don't already have a table "custs"). Add it to your database.

              Try adding some new records and then examine the calculated field rule for the c_code field.

              I added an extra digit to generate codes like

              Fle01
              Fle02
              Fle03

              Always easier to do that than to correct/modify it later. With Smith, Jones, etc you can't be sure you don't need the extra codes.
              Last edited by Stan Mathews; 01-22-2010, 01:04 PM.
              There can be only one.

              Comment


                #8
                Re: Auto Increment using characters and numerals

                Thanks Stan, will test it and let you know.

                Comment


                  #9
                  Re: Auto Increment using characters and numerals

                  Be aware that re-calculating the field rules will cause trouble with this approach. You can use the same expression for a default value field rule, simple default expression, and not allow the user to change it.
                  There can be only one.

                  Comment

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