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Message Posted: Mon, 12 Mar 2001 @ 20:15:50 GMT

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Subj:   Re: Secondary Indexes
From:   Andy Blevins

It is rare to see more than 2 to 4 SIs on Teradata tables (there are exceptions). Careful evaluation should be done before putting a SI on a table to ensure that it will be of benefit. There is a cost in space and updating time for each SI added. Use good modeling techniques and the explain to ensure the SIs are being used.

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