查看sql语句执行时间/测试sql语句性能

SET STATISTICS PROFILE ON 
SET STATISTICS IO ON 
SET STATISTICS TIME ON 
GO 
/*--你的SQL脚本开始*/

 Select * From (Select ROW_NUMBER() Over (Order By CreateDate desc) As rowNum, * From 
 (SELECT * from View_FileModel  where 1=1    And FileStatus=1   
 And ApplyDeptId in
 ( '质量员' , '质量组' , '医院检验科'  ) 
  --And CreateUserName like  '%%'--@CreateUserName 
  -- And ApproverUserName like '%%'-- @ApproverUserName 
 ) As T ) As N Where rowNum > 0 And rowNum <= 20
 

/*--你的SQL脚本结束*/
GO
SET STATISTICS PROFILE OFF 
SET STATISTICS IO OFF 
SET STATISTICS TIME OFF

执行---查看--查询花费多长时间？

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。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 [TestCase] FROM [TestCaseSelect] 
GO /*--你的SQL脚本结束*/
SET STATISTICS PROFILE OFF 
SET STATISTICS IO OFF 
SET STATISTICS TIME OFF