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:
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:
Demo For three kinds of Method:
For SQL Script:
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:
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:
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:
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.
原创文章，作者：kirin，如若转载，请注明出处：https://blog.ytso.com/tech/database/234156.html