sql - 从周号获取周开始日期和周结束日期

我有一个查询，该查询计算数据库中成员的结婚日期。

SELECT
  SUM(NumberOfBrides) AS [Wedding Count]
  , DATEPART( wk, WeddingDate) AS [Week Number]
  , DATEPART( year, WeddingDate) AS [Year]
FROM  MemberWeddingDates
GROUP BY DATEPART(year, WeddingDate), DATEPART(wk, WeddingDate)
ORDER BY SUM(NumberOfBrides) DESC

在结果集中表示每周的开始和结束时如何计算？

SELECT
  SUM(NumberOfBrides) AS [Wedding Count]
  , DATEPART(wk, WeddingDate) AS [Week Number]
  , DATEPART(year, WeddingDate) AS [Year]
  , ??? AS WeekStart
  , ??? AS WeekEnd
FROM  MemberWeddingDates
GROUP BY DATEPART(year, WeddingDate), DATEPART(wk, WeddingDate)
ORDER BY SUM(NumberOfBrides) DESC

最佳答案

您可以查找星期几，然后在日期上加上日期以获取开始和结束日期。

DATEADD(dd, -(DATEPART(dw, WeddingDate)-1), WeddingDate) [WeekStart]

DATEADD(dd, 7-(DATEPART(dw, WeddingDate)), WeddingDate) [WeekEnd]

您可能还希望同时考虑从日期中剥离时间。