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Message Posted: Thu, 22 Jan 2004 @ 11:48:25 GMT


     
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Subj:   Indexes vs statistics
 
From:   Ferry, Craig

Does anyone know of a good white paper to discuss the usage of indexes and statistics. I would like something that would tell me the recommendations of when to build another index on a table as opposed to just collecting statistics on a group of columns. I have an environment that people do a lot of ad hoc queries and I want to optimize my tables the best way possible.

Currently I have used the following strategy.

Obviously the primary index. I decide this by mostly dispersion of my data across amps.

I use secondary indexes based on columns I know are join columns to other tables.

I collect stats on each column in the table individually.

I collect stats on each index in the table.

From what I learned from my last post, a view will NOT use indexes or statistics IF it is set up any differently than just CREATE VIEW AS SELECT * FROM MY_TABLE


TIA



     
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