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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

    Originally posted by Dolphin View Post
    I will need the numbers to look like this:

    Surname: Flemming

    FLE1/0001, FLE1/0002, FLE1/0003
    I do not think you want the ID's look like that...At least not the ID you will use to link tables in grids.

    The first table should have an internal ID numeric (or character number like in alpha autoincremented) which uniquely identifies the record and your second table should have similar also.

    In the Second Table you would have an ID which uniquely identify that record together with a field which gives the link to the master table (the internal ID there)..

    Now you can create views / sets / grid views over them.

    Never a good idea to combine fields to make unique with some functional meaning you give to them...What are you doing when there are more than 10 Flemings...

    If you still want your XXX9/9999 as a display field you should create a separate field and with XBASIC fill this field initially with the constraints you define which are necessary..But I personally do not see why. You can always select and sort based on the other meaningfull fields in your table. Like name, address, city or so.

    You will do the linking with the Internal ID's. You will use the add. fields to show to your users.

    XBASIC has enough features to enable you to fill these add. field with the constraints you want.
    Like first 3 characters of a (already existing) name field together with a sequence number to make it unique.

    Although you can have field rules autoincrement on XXX999 values I do not think you can have them based on dynamic lookups of existing values in the tables...You wlll have to write that yourself.
    But I am open for any who can give me a way to perform such.
    Last edited by rleunis; 06-29-2009, 03:31 PM.

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