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why sql server not using the index.

  • July 5, 2010 at 3:28 am

    #234642

    Hi,

    Why sql server is not using the created indexes, how it will determine the index is useful, how the statistics are useful. Please provide some helpful links.

    thanks

    🙂

  • July 5, 2010 at 4:40 am

    #1188725

    Either the index isn't selective enough or the query isn't SARGable.

    Care to post the query and indexes?

    As for links, check the index category on my blog.

    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

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