SQL-根据自定义开始日期生成两周结束日期

我想根据给定的开始日期获得一个自定义的Fort Night时段。 我有一张这样的桌子：

IF OBJECT_ID('tempdb..#tbl1') IS NOT NULL DROP TABLE #tbl1
SET DATEFIRST 1
DECLARE @StartDateTime DATETIME
DECLARE @EndDateTime DATETIME

SET @StartDateTime = '2016-09-03'
SET @EndDateTime = '2017-01-28';

WITH DateRange(DateData) AS 
(
    SELECT @StartDateTime as Date
    UNION ALL
    SELECT DATEADD(d,1,DateData)
    FROM DateRange 
    WHERE DateData < @EndDateTime
)
SELECT ROW_NUMBER() OVER(ORDER BY DateData ASC) As ROWNum,DateData AS Date1
into  #tbl1
FROM DateRange
OPTION (MAXRECURSION 0)
GO

SELECT top 10 * FROM #tbl1

         Date1
        2016-09-09 00:00:00.000
        2016-09-10 00:00:00.000
        2016-09-11 00:00:00.000
        2016-09-12 00:00:00.000
        2016-09-13 00:00:00.000
        2016-09-14 00:00:00.000
        2016-09-15 00:00:00.000
        2016-09-16 00:00:00.000
        2016-09-17 00:00:00.000
        2016-09-18 00:00:00.000
        2016-09-19 00:00:00.000
        2016-09-20 00:00:00.000
        2016-09-21 00:00:00.000
        2016-09-22 00:00:00.000

我正在使用SQLServer2005

答复: 我能够用下面的代码解决它。基本上，我只创建了3个表： 起始日期 结束日期 中间日期

“开始/结束日期”表仅包含我的两周周期的开始和结束以及ID行号 中间日期表包含两个日期之间的所有日期，也有一个ID列，但不是每行增加1，而是每14行增加1。 然后我加入了3张桌子。基本上，开始/结束日期表是查找表。 我每14天从代码中获取一次行数

试试这个：

SELECT Date1,
       DATEADD(DD, -1, DATEADD(WW,2,Date1)) AS FortNightEndDate
FROM #tbl1

---

什么是双周结束日期？你怎么计算呢？基本上我需要两周的结束日期，从星期三到星期四。在本例中，从2016-09-09到2016-09-22的所有日期都属于两周结束日期2016-09-22，该日期不起作用。每个日期增加2周。我需要知道堡垒夜幕结束的日期。与您将获得的周末或月末日期相同。例如，它会知道2016-09-05至2016-09-011年/月/日都属于截至2016-09-11周周一的一周。我也需要同样的东西，但是从星期四开始两周

-- BEtween Dates
IF OBJECT_ID('tempdb..#BetweenDates') IS NOT NULL DROP TABLE #BetweenDates
DECLARE @StartDateTime DATETIME
DECLARE @EndDateTime DATETIME

SET @StartDateTime = '2016-09-09'
SET @EndDateTime = '2017-04-30';

WITH DateRange(DateData) AS 
(
    SELECT @StartDateTime as Date
    UNION ALL
    SELECT DATEADD(d,1,DateData)
    FROM DateRange 
    WHERE DateData < @EndDateTime
)
SELECT 
    DateData
into  #BetweenDates
FROM DateRange
OPTION (MAXRECURSION 0)
GO



select 
    (case when convert(int, (ROW_NUMBER() OVER (Order by (select 0)) % 14))=0 then 0 else 1 end) 
    + convert(int, (ROW_NUMBER() OVER (Order by (select 0)) / 14)) as ID
    ,DateData
INTO #BetweenDates_ID
from #BetweenDates


-- Start Dates

IF OBJECT_ID('tempdb..#StartDates') IS NOT NULL DROP TABLE #StartDates
DECLARE @StartDateTime DATETIME
DECLARE @EndDateTime DATETIME

SET @StartDateTime = '2016-09-09'
SET @EndDateTime = '2017-04-30';

WITH DateRange(DateData) AS 
(
    SELECT @StartDateTime as Date
    UNION ALL
    SELECT DATEADD(d,14,DateData)
    FROM DateRange 
    WHERE DateData < @EndDateTime
)
SELECT ROW_NUMBER() OVER(ORDER BY DateData ASC) As ID,DateData
into  #StartDates
FROM DateRange
OPTION (MAXRECURSION 0)
GO

-- End Dates

IF OBJECT_ID('tempdb..#EndDates') IS NOT NULL DROP TABLE #EndDates
DECLARE @StartDateTime DATETIME
DECLARE @EndDateTime DATETIME

SET @StartDateTime = '2016-09-22'
SET @EndDateTime = '2017-04-30';

WITH DateRange(DateData) AS 
(
    SELECT @StartDateTime as Date
    UNION ALL
    SELECT DATEADD(d,14,DateData)
    FROM DateRange 
    WHERE DateData < @EndDateTime
)
SELECT ROW_NUMBER() OVER(ORDER BY DateData ASC) As ID,DateData
into  #EndDates
FROM DateRange
OPTION (MAXRECURSION 0)
GO


--SELECT * FROM #StartDates
--SELECT * FROM #EndDates
--SELECT * FROM #BetweenDates_ID

SELECT 
    st.DateData AS StartDate
    ,ed.DateData AS EndDate
    ,bd.DateData AS BetweenDate
FROM 
    #StartDates st
    JOIN
    #EndDates ed
    ON st.ID = ed.ID
    LEFT JOIN
    #BetweenDates_ID bd
    ON st.ID = bd.ID

SELECT Date1,
       DATEADD(DD, -1, DATEADD(WW,2,Date1)) AS FortNightEndDate
FROM #tbl1