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Message Posted: Tue, 07 Aug 2012 @ 22:19:46 GMT


     
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Subj:   Re: Concept of Index Only Scans in Teradata?
 
From:   Walter, Todd

A NUSI is all AMP access because C, D will not be collocated with A. But if a common access path is to supply C, D values, then a single table JI with C,D as the PI will provide single amp access and answer the query from the index without access to the base table.



     
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