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Indexing Suggestion Needed for Performance


Indexing Suggestion Needed for Performance

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rollercoaster43
rollercoaster43
SSC Eights!
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Hi All.

I have a query which say

Scenario 1 :

select colmA from table1 where colmB = @colmB and ColmC=@columC and colmD= @colmD

Now, here if I create a non clustered covering index for performance, what should it be like to avoid table scan?

Scenario 2 :

select colmA from table1 where colmB = @colmB and ColmC=@columC and colmD<> @colmD

Now,here is it possible to create proper indexing to avoi d a table scan when in <> operator is used in the query??
GilaMonster
GilaMonster
SSC Guru
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Group: General Forum Members
Points: 743169 Visits: 48477
http://www.sqlservercentral.com/articles/Indexing/68636/

That should answer most of your questions.

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


rollercoaster43
rollercoaster43
SSC Eights!
SSC Eights! (835 reputation)SSC Eights! (835 reputation)SSC Eights! (835 reputation)SSC Eights! (835 reputation)SSC Eights! (835 reputation)SSC Eights! (835 reputation)SSC Eights! (835 reputation)SSC Eights! (835 reputation)

Group: General Forum Members
Points: 835 Visits: 435
Thanks Gail..!!
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