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.micro

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.