分析SQL语句性能3种方法分享

原作者: [db:作者] 来自: [db:来源] 收藏邀请

第一种方法：

 
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

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:

复制代码代码如下:

 
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:

复制代码代码如下:

 
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:

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 

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.