有關SQL語句性能3種方法的分析

本文是一篇有關SQL語句性能3種方法的文章，有需要的朋友可以參考下。

第一種方法：

復制代碼 代碼如下:

Minimsdn.com為您提供的代碼:

-- 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

第二種方法:

復制代碼 代碼如下:

MINIMSDN.com為您提供的代碼:

--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

第三種方法:

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:

復制代碼 代碼如下:

select * from dbEBMSStaging.dbo.MSSalesTxlatOrganizationMaster_Corg StagingOMC

v  Its Execution plan: (

)

v  Its IO info: (

)

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

v  Its Detail info Etc.: (

)

For SQL Script:

復制代碼 代碼如下:

select top 100 * from dbEBMSStaging.dbo.MSSalesTxlatOrganizationMaster_Corg StagingOMC

v  Its Execution plan: (

)

v  Its IO info: (

)

v  Its Detail info Etc.: (

)

For SQL Script:

復制代碼 代碼如下:

select top 100 * from dbEBMSStaging.dbo.MSSalesTxlatOrganizationMaster_Corg StagingOMC

order by StagingOMC.COrgTPName

v  Its Execution plan: (

)

v  Its IO info: (

)

v  Its Detail info Etc.: (

)

For SQL Script:

復制代碼 代碼如下:

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

group by StagingOMC.COrgTPName

order by StagingOMC.COrgTPName

v  Its Execution plan: (

)

v  Its IO info: (

)

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v  Its Detail info Etc.: (

)

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-  -  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.

第一種方法：

復制代碼 代碼如下:

Minimsdn.com為您提供的代碼:

-- 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

第二種方法:

復制代碼 代碼如下:

MINIMSDN.com為您提供的代碼:

--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

第三種方法:

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:

復制代碼 代碼如下:

select * from dbEBMSStaging.dbo.MSSalesTxlatOrganizationMaster_Corg StagingOMC

v  Its Execution plan: (