定义从期间开始的两个日期之间的周数

Question

我有，例如：

create table #test ( job int, dateL date)
insert into #test values
(1, '2022-04-01'),
(2, '2022-04-02'),
(3, '2022-04-12'),
(4, '2022-04-27'),
(5, '2022-05-01')

declare
@startdate date = '2022-04-01',
@enddate date = '2022-04-30'

set @startdateweekstart = (select DATEPART(WEEKDAY, @startdate))
SELECT DATEADD( DAY , @startdateweekstart - DATEPART(WEEKDAY, @startdate), CAST (@startdate AS DATE )) [Week_Start_Date]

Select DATEADD( DAY , @startdateweekstart + 6 - DATEPART(WEEKDAY, @startdate), CAST (@startdate AS DATE )) [Week_End_Date]

所以我搜索了一个解决方案，但确实找到了一个。并且不确定我是否在正确的轨道上

我需要让我的输出看起来像这样，以便稍后在 ssrs 中按周分组

job  dateL          Week
1    '2022-04-01'    1
2    '2022-04-02'    1
3    '2022-04-12'    2
4    '2022-04-27'    4
5    '2022-05-01'    0

其中 0 不属于@startdate 和@enddate 之间的范围。

如果有任何正确的方向，我们将不胜感激！谢谢！

Answer 1

代码如下：

SELECT job,dateL,
(
  SELECT CASE 
    WHEN dateL BETWEEN @startdate AND  @enddate THEN 
        (SELECT MAX(v) FROM (VALUES (1), (DATEDIFF(wk, @startdate, dateL))) AS VALUE(v)) 
    ELSE 0 
  END
)
AS Week 
FROM #test;