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    分析SQL语句性能3种方法分享
    第一种方法:
    复制代码 代码如下:

    Minimsdn.com为您提供的代码:
    -- Turn ON [Display IO Info when execute SQL]
    SET STATISTICS IO ON
    -- Turn OFF [Display IO Info when execute SQL]
    SET STATISTICS IO OFF

    Link: http://msdn.microsoft.com/zh-cn/library/ms184361.aspx
    第二种方法:
    复制代码 代码如下:

    MINIMSDN.com为您提供的代码:
    --Turn ON [Display detail info and the request for resources]
    SET SHOWPLAN_ALL ON
    -- Turn OFF [Display detail info and the request for resources]
    SET SHOWPLAN_ALL OFF

    Link: http://msdn.microsoft.com/zh-cn/library/ms187735
    第三种方法:

    Links: http://msdn.microsoft.com/zh-cn/library/ff650689.aspx ; http://msdn.microsoft.com/zh-cn/library/aa175244(v=SQL.80).aspx
    Demo For three kinds of Method:
    For SQL Script:
    复制代码 代码如下:

    select * from dbEBMSStaging.dbo.MSSalesTxlatOrganizationMaster_Corg StagingOMC

    Its Execution plan: ()

     

    Its IO info: ()

     

    -  -  You can try one table with 100/10000/1000000 rows but create/don't create Clustered/NONCLUSTERED Index.

    Its Detail info Etc.: ()


    For SQL Script:

    复制代码 代码如下:

    select top 100 * from dbEBMSStaging.dbo.MSSalesTxlatOrganizationMaster_Corg StagingOMC

    Its Execution plan: ()

    Its IO info: ()

     

    Its Detail info Etc.: ()

    For SQL Script:

    复制代码 代码如下:

    select top 100 * from dbEBMSStaging.dbo.MSSalesTxlatOrganizationMaster_Corg StagingOMC
    order by StagingOMC.COrgTPName

    Its Execution plan: (   )

     

    Its IO info: ()

    Its Detail info Etc.: ()

    For SQL Script:

    复制代码 代码如下:

    select top 100 StagingOMC.COrgTPName,COUNT(CorgID) from dbEBMSStaging.dbo.MSSalesTxlatOrganizationMaster_Corg StagingOMC
    group by StagingOMC.COrgTPName
    order by StagingOMC.COrgTPName

    Its Execution plan: ()

     

     

    Its IO info: ()

     

    Its Detail info Etc.: ()

     

     

    -  -  By these three kinds of methods, you can try to check those words in the internet web are right or wrong about how to improve SQL Script performance.

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