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Re: Unique constraint over 2 columns (one of them nullable)

From: DA Morgan <damorgan_at_psoug.org>
Date: Thu, 06 Dec 2007 15:30:01 -0800
Message-ID: <1196983797.513846@bubbleator.drizzle.com> 





Bram Pouwelse wrote:


> Hi all,

> 

> I wonder if it's possible to enforce uniqueness of a combination of 2 

> columns where one of the 2 is nullable.




Isn't that what a unique constraint does by default?

-- 
Daniel A. Morgan
Oracle Ace Director & Instructor
University of Washington
damorgan_at_x.washington.edu (replace x with u to respond)
Puget Sound Oracle Users Group
www.psoug.org


Received on Thu Dec 06 2007 - 17:30:01 CST












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