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Message Posted: Fri, 20 May 2011 @ 09:19:51 GMT


     
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Subj:   Defining SI on columns that are part of PI
 
From:   Anomy Anom

<-- Anonymously Posted: Monday, May 16, 2011 12:58 -->

Hi,

I have a small doubt regarding SI.

If i have a table with 10 columns say A-J & the PI is defined on columns (A,B,C, D).

Now if i have a lot of joins on Column C, will it help in performance enhancement if i define SI on it.

I heard that defining SI on columns that already part of PI is not advisable.

Please elaborate on this one.


Thanks



     
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