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Message Posted: Wed, 01 Feb 2006 @ 16:02:30 GMT


     
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Subj:   Re: Use of Multiset for Large Table
 
From:   Michael Larkins

You would never put a UPI on a multiset table - doesn't make any sense because it would not allow duplicate rows. If you have a UPI on a set table Teradata does not have to go though the duplicate row checking because a duplicate is not allowed in the PI. If the PI cannot be a duplicate the row cannot be a duplicate.

Make sense?


Michael Larkins
Certified Teradata Master
Certified Teradata SQL Instructor



     
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