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Unique index vs. unique constraint

From: Michael Hjorth <michael_hjorth_at_my-deja.com>
Date: Thu, 26 Aug 1999 09:00:56 GMT
Message-ID: <7q2vo5$c0g$1@nnrp1.deja.com> 





What is the functional difference between a unique index and a unique
constraint?


I know the latter has a constraint as well as the index, but apparently
it enforces the same restrictions on the database as the unique index.
Or did I get it wrong?


Why would I prefer one over the other in a particular case?



Thank you for any comments.



Michael.




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Received on Thu Aug 26 1999 - 04:00:56 CDT












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