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Help with incrementing a primary key

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    #1

    Help with incrementing a primary key

    I am trying to increment a primary key in a database by +1 everytime someone inputs data into a form and hits the submit button. The data from the form gets inputted into a database. This way the primary key will always be unique. What is the best way to do this and what would the code be?
    Tags: None
    #2
    Re: Help with incrementing a primary key

    What database are you using? Alpha? MySQL? Access? The way you do it depends on what we're talking about.

    Comment

      #3
      Re: Help with incrementing a primary key

      Using MSSQL right now but might be moving to MySQL soon. Can you tell me both ways if that is not asking too much?

      Comment

        #4
        Re: Help with incrementing a primary key

        Using either of those, the generally accepted best way to do it is to set the primary key to be an autoincrement field. It is then maintained for you automagically. Every new record is automagically assigned a unique id by the server. The "by the server" part of this is important, since MANY different clients can be hitting the server all at once.

        All you have to do is insert a record and not even mention the "ID" field. It will take care of itself.

        For example if you have a table called "foobar" with fields "foobar_id" - Autoincrement "foofield1" - VarChar(100) "foofield2" Varchar(100)

        Given that, an insert statement might look like "insert into foobar (foofield1,foofield2) values ('foovalue','foo2value')"

        Then if you selected * from foobar you would see those fields, plus the foobar_id for that record would =1 - and that would increment every time.

        Bottom line - just insert the records.

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          #5
          Re: Help with incrementing a primary key

          One more thought - alpha handles much of this for you in a grid... I think it does it for you in a dialog as well... I really don't think think that you will NEED to code the SQL per se...

          If you are new to Alpha and trying to figure it out, might want to start by watching some of the videos dealing with the Dialog component. There are several that deal with creating a dialog that inserts records into a table. Just keep clicking play and listening to Selwyn's accent until everyone in your abode swears that you are either moving to South Africa or have been golfing with Ernie Els or something...(grin)

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            #6
            Re: Help with incrementing a primary key

            With MS SQL you would set the column as an "Identity" column. In MySQL you would set the column as “auto increment”.
            _______________________________
            Steven McLean
            i3 Home Inspections
            [email protected]

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              #7
              Re: Help with incrementing a primary key

              D'oh! Thanks for that , Steven! You can tell which world I've been hanging out in recently.... (grin)

              Sorry for the misnomer.

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