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1
+7  Q: 

what is the difference between UNIQUE INDEX and UNIQUE KEY??

I have seen couple of sample tables one is with UNIQUE INDEX and other is with UNIQUE KEY. what is the difference between two?? or both are same?

+1  A: 

CREATE TABLE
KEY is normally a synonym for INDEX.

You can use them interchangeably as described in syntax page
[CONSTRAINT [symbol]] UNIQUE [INDEX|KEY]

Naktibalda  2010-07-14 11:00:17

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