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How can I create an automatic number in a second field?

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    #1

    How can I create an automatic number in a second field?

    Trying to create a field that has an automatic number as default, in addition to the auto increment field which serves as the record primary key.

    I am a noob so any help is greatly appreciated.
    Tags: None
    #2
    Re: How can I create an automatic number in a second field?

    Hi John,

    What value do you want in this other field? Is this a calculated field? What tables are you working with, DBF or SQL?
    Regards
    Keith Hubert
    Alpha Guild Member
    London.
    KHDB Management Systems
    Skype = keith.hubert


    For your day-to-day Needs, you Need an Alpha Database!

    Comment

      #3
      Re: How can I create an automatic number in a second field?

      Thanks for your reply,

      I am in sql and the value needs to be unique. I suppose calculated would work if I could keep it from changing everytime I reload the component. As it is my calculated was based on the timestamp and this causes it to change everytime I reload the component, even for existing records.

      Comment

        #4
        Re: How can I create an automatic number in a second field?

        Try using a TRIGGER in the backend SQL database.

        The trigger will calculate the number for you.

        Comment

          #5
          Re: How can I create an automatic number in a second field?

          Thanks Roger, but like I said, I am a noob and have no idea how to make SQL do such a thing. I was really hoping to find a piece of javascript or something to give me a unique number if the field is empty. If it isn't empty, would want it left alone. I have tried a lot of things before coming here for help. Not technically savvy enough to write the code myself. I tried using code in the default setting for the field and it rejects the code. I may have to settle for the obvious workaround of having a form that is distinctly for data entry and a different one for every instance of looking the information up. That probably makes the most sense if I am using a calculated field.

          Comment

            #6
            Re: How can I create an automatic number in a second field?

            Hi John,

            I understand the automatic number you need, has to be unique and probably incremental to the same number in the previous record.
            Like a serial number.

            If this is the case, javascript will never solve your problem. As javascript sees only your current record and knows nothing about other records in the database.


            Which SQL database are you using?

            Comment

              #7
              Re: How can I create an automatic number in a second field?

              I am using MySQl as the backend. Thanks in advance for your help.

              Comment

                #8
                Re: How can I create an automatic number in a second field?

                You need the number to be a serial number?

                Or only a unique number in the table?

                Does it need to be a number or a unique identifier would do? (UUID look like numbers and are unique).

                Comment

                  #9
                  Re: How can I create an automatic number in a second field?

                  It can be just a unique number, doesn't have to be serial.

                  Comment

                    #10
                    Re: How can I create an automatic number in a second field?

                    You are using a Grid or a UX (Dialog)?

                    Comment

                      #11
                      Re: How can I create an automatic number in a second field?

                      For a Grid, in "Initial Value" property you should type:

                      =API_UUIDCREATE()


                      In a UX , in the "Default Value" property type:

                      =API_UUIDCREATE()

                      Comment

                        #12
                        Re: How can I create an automatic number in a second field?

                        Thank you Roger.

                        Comment

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