From: "Stefan Wagner" <[EMAIL PROTECTED]>
> Hi!
>
> I got a question regarding the user_id, because I was wondering why it exists
> at all. The login_name is unique already, so why do you create a primary key
> with the user_id? I don't see an advantage.
>
> Thanks for your answers.
>
> Ciao,
> Stefan
What if you want to change your login_name? Having user_id insulates you
from having to change values in related tables.
Scott
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