SQL Server 分析SQL语句性能3种方法

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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 

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 

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代码如下:

 
select * from dbEBMSStaging.dbo.MSSalesTxlatOrganizationMaster_Corg StagingOMC 

v  Its Execution plan: (【图片暂缺】)

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v  Its IO info: (【图片暂缺】)

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

v  Its Detail info Etc.: (【图片暂缺】)

【图片暂缺】
For SQL Script:

代码如下:

 
select top 100 * from dbEBMSStaging.dbo.MSSalesTxlatOrganizationMaster_Corg StagingOMC 

v  Its Execution plan: (【图片暂缺】)

【图片暂缺】

v  Its IO info: (【图片暂缺】)

【图片暂缺】

v  Its Detail info Etc.: (【图片暂缺】)

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For SQL Script:

代码如下:

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

v  Its Execution plan: (   【图片暂缺】)

【图片暂缺】

v  Its IO info: (【图片暂缺】)

【图片暂缺】

v  Its Detail info Etc.: (【图片暂缺】)

【图片暂缺】

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: (【图片暂缺】)

 【图片暂缺】

v  Its IO info: (【图片暂缺】)

 【图片暂缺】

v  Its Detail info Etc.: (【图片暂缺】)

 【图片暂缺】

-  -  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.

（编辑：李大同）

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