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.

原文链接:https://www.f2er.com/mssql/63815.html

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