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Message Posted: Fri, 20 May 2011 @ 12:12:39 GMT

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Subj:   Re: Defining SI on columns that are part of PI
From:   Adithya K Bayyana


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

[ANS] It will help in performance enhancement.

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

[ANS] I think if the primary index is created on multiple columns and if we are using one of those columns individually in lot of queries either for join/condition then it is preferable to create SI on that column.



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