MSSQL数据库如何查看sql语句执行效率?

小渣渣

网站建设语言中ASP.NET常对应使用的数据库是MSSQL,在MSSQL使用中如何查看SQL语句执行的时间,我们以下通过用SQL语句来测试,得出他的执行效率,让各位网站编码人员能更好地掌握.我们的方法是通过设置STATISTICS我们可以查看执行SQL时的系统情况。选项有PROFILE，IO ，TIME。具体介绍如下：
SET STATISTICS PROFILE ON：显示分析、编译和执行查询所需的时间（以毫秒为单位）。
SET STATISTICS IO ON：报告与语句内引用的每个表的扫描数、逻辑读取数（在高速缓存中访问的页数）和物理读取数（访问磁盘的次数）有关的信息。
SET STATISTICS TIME ON：显示每个查询执行后的结果集，代表查询执行的配置文件。

使用方法：打开SQL SERVER 查询分析器，输入以下语句：
SET STATISTICS PROFILE ON
SET STATISTICS IO ON
SET STATISTICS TIME ON
GO --你的SQL脚本开始
SELECT [LastName] FROM [persons] --自己的SQL语句
GO --你的SQL脚本结束
SET STATISTICS PROFILE OFF
SET STATISTICS IO OFF
SET STATISTICS TIME OFF
   使用以上的代码后,会执行得出一个结果显示页面,大家在结果显示里面就能找得相应的答案了.

SQL Server parse and compile time:
   CPU time = 0 ms, elapsed time = 5 ms.

(1 row(s) affected)
Table 'sp_UserAssets'. Scan count 1, logical reads 2, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'sp_RealNameAuthentication'. Scan count 1, logical reads 0, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'sp_UserInfo'. Scan count 0, logical reads 2, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.

(6 row(s) affected)

(1 row(s) affected)

SQL Server Execution Times:
   CPU time = 16 ms,  elapsed time = 384 ms.
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.