Yes, you can but you probably need a real good reason to. As Tilghman
pointed out a PK is a unique key. If you have another unique key (a
candidate key) then you need revisit your datamodel and make sure you have a
good reason. Candidate keys to exist in the real world but they are rare.
Cal
http://www.calevans.com
-----Original Message-----
From: Jacob Friis Larsen [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 07, 2001 9:58 AM
To: [EMAIL PROTECTED]
Subject: PRIMARY KEY (userid), UNIQUE (userid)
Is there an idea in having a PRIMARY KEY and UNIQUE key for the same table
column ?
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