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  • Sql Server Statement Output

    在oracle中,我们要查看查询统计信息,我们可以设计autotrace,可以参考设置SQL*PLUS的AUTOTRACE,那么在sqlserver中如何设置呢?

    在sqlserver中也有统计信息,主要有statistics time和statistics io,比如我们执行如下查询,

    set statistics time on
    set statistics io on
    
    select * from Sales.Orders
    
    set statistics time off
    set statistics io off

    在MESSAGE标签中我们可以查看到一下一下信息

    SQL Server parse and compile time: 
       CPU time = 0 ms, elapsed time = 0 ms.
    
     SQL Server Execution Times:
       CPU time = 0 ms,  elapsed time = 0 ms.
    SQL Server parse and compile time: 
       CPU time = 0 ms, elapsed time = 13 ms.
    
     SQL Server Execution Times:
       CPU time = 0 ms,  elapsed time = 0 ms.
    
     SQL Server Execution Times:
       CPU time = 0 ms,  elapsed time = 0 ms.
    
    (830 row(s) affected)
    Table 'Orders'. Scan count 1, logical reads 21, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
    
    (1 row(s) affected)
    
     SQL Server Execution Times:
       CPU time = 0 ms,  elapsed time = 169 ms.

    其实SQL SERVER MANAGEMENT STUDIO(SSMS)有这样的功能,不需要显示标明,如下图所示:

    ps:2012-8-27

    除了上面的time和io以外,还有一个profile,这个在SSMS中好像没有设置,可以通过如下命令打开

    SET STATISTICS PROFILE { ON | OFF }

    主要作用是显示语句的配置文件信息。 STATISTICS PROFILE 对即席查询、视图和存储过程有效。

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  • 原文地址:https://www.cnblogs.com/xwdreamer/p/2577853.html
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