分析SQL语句性能3种方法分享

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第一种方法： 

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: 

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: 

代码如下:

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:

代码如下:

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:

代码如下:

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:

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 

v  Its Execution plan: ()

v  Its IO info: ()

v  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.