Question

目前我的查询是从当前日期到过去7天获取数据。我想从过去一周获取数据。目标如果今天是2013-06-20那么数据应该从上周（2013-06-10）获取2013-06-16）。我搜索了许多论坛的确切答案，但仍然无法找到。

这是我的查询

 SELECT CONVERT(varchar(25),PostDate,107) AS duration, count(*) AS posts
    FROM MDBDetails WHERE 
      DateAdd(dd, 0, DateDiff(dd, 0, PostDate)) <= DateAdd(dd, 0, DateDiff(dd, 0, GETDATE())) AND 
      DateAdd(dd, 0, DateDiff(dd, 0, PostDate)) >= DateAdd(dd, 0, DateDiff(dd, 0, GETDATE())) - 7

          GROUP BY  CONVERT(varchar(25),PostDate,107)
          ORDER BY duration

Answer 1

USE DATEDIFF（周,,）

 SELECT CONVERT(varchar(25),PostDate,107) AS duration, count(*) AS posts
 FROM MDBDetails 
 WHERE DATEDIFF(week, PostDate,GETDATE()) = 1
 GROUP BY  CONVERT(varchar(25),PostDate,107)
 ORDER BY duration

Answer 2

以下代码应返回上一周的星期一。

SELECT DATEADD(WEEK, -1, DATEADD(WEEK, DATEDIFF(WEEK, 0, SYSDATETIME()), 0));

Answer 3

datepart函数可以获取周数。减去1，你就有了前一周。

SELECT DATEPART(WEEK,GETDATE()) -1

然后，您可以使用周数和年份来过滤数据。

如何从sql中获取过去一周的数据

3 个答案: