分析SQL语句性能3种方法分享

第一种方法：


复制代码 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:


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.