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。
语句示例:
SET STATISTICS PROFILE ON;
SET STATISTICS IO ON;
SET STATISTICS TIME ON;
GO
/*--你的SQL脚本开始*/
SELECT [GroupBy1].[A1] AS [C1]
FROM ( SELECT COUNT(1) AS [A1]
FROM [dbo].[Questions] AS [Extent1]
WHERE ( [Extent1].[CheckUser] IS NOT NULL )
AND ( NOT ( ( N'' = [Extent1].[CheckUser] )
AND ( [Extent1].[CheckUser] IS NOT NULL )
)
)
AND ( [Extent1].[Source] IN ( N'xxx1', N'xxx2', N'xxx3' ) )
AND ( [Extent1].[Source] IS NOT NULL )
) AS [GroupBy1];
/*你的SQL脚本结束*/
GO
SET STATISTICS PROFILE OFF;
SET STATISTICS IO OFF;
SET STATISTICS TIME OFF;
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