Question

这类似于mySQL问题，除了我只想要月末日期：Get a list of dates between two dates

我希望能够输入两个日期，例如：

SELECT EndOfMonth('1/1/2015', '1/1/2017');

返回的结果应该是

EndOfMonth
1/31/2015
2/28/2015
3/31/2015
.
.
.
10/31/2016
11/30/2016
12/31/2016

我使用的SQL Server版本是2008，所以我实际上无法访问EOMONTH（）。

Answer 1

使用数字表可以让事情变得更轻松。如果您还没有数字表，可以使用以下sql创建一个（取自this SO post）：

SELECT TOP 10000 IDENTITY(int,0,1) AS Number
INTO Tally
FROM sys.objects s1       
CROSS JOIN sys.objects s2 

ALTER TABLE Tally ADD CONSTRAINT PK_Tally PRIMARY KEY CLUSTERED (Number)

要详细了解数字表及其使用方法，请阅读Jeff Moden的The "Numbers" or "Tally" Table: What it is and how it replaces a loop文章。

使用EOMONTH内置功能后，使用数字表对2012或更高版本来说相当容易：

DECLARE @Start date = '2015-01-01', @End date = '2017-01-01'

SELECT EOMONTH(DATEADD(MONTH, Number, @Start))
FROM Tally
WHERE Number < DATEDIFF(MONTH, @Start, @End)

对于早期版本，您可以使用DATEADD和DATEDIFF来获取上个月的最后一天，然后只需添加一个月：

SELECT DATEADD(DAY, -DATEPART(DAY, @Start), (DATEADD(MONTH, Number+1, @Start)))
FROM Tally
WHERE Number < DATEDIFF(MONTH, @Start, @End)

See a live demo on rextester

Answer 2

您可以使用Common Table表达式（CTE）轻松实现此目的。

--Declaration of start date and end date
declare @StartDate datetime='2017-01-01', @endDate datetime='2017-12-01'

-- Expression
;WITH monthcte
     AS (SELECT EOMONTH(@StartDate) AS dates
         UNION ALL
         SELECT DATEADD(month, 1, dates) AS dates
         FROM   monthcte
         WHERE  dates <@endDate     
         )

-- Select query over expression
SELECT  EOMONTH(dates) AS EndOfMonth
FROM   monthcte
Order by EndOfMonth

Answer 3

如果您无法使用EOMonth，可以按如下方式生成：

declare @d1 date = '1/1/2015'
declare @d2 date = '1/1/2017'

select top (datediff(MONTH,@d1,@d2)+1) Dates = DateAdd(day,-1, Dateadd(M,Row_number() over(order by (select null)), @d1)) from
    master..spt_values n1, master..spt_values n2

如果您的SQL Server版本中有EoMonth，那么您可以尝试如下：

select top (datediff(MONTH,@d1,@d2)+1) Dates = EoMonth(Dateadd(M,Row_number() over(order by (select null))-1, @d1)) from
    master..spt_values n1, master..spt_values n2

Answer 4

月份列表：

DECLARE @StartDate datetime
DECLARE @EndDate datetime
set @StartDate = '01/01/2015'
set @EndDate = '01/01/2017'

;WITH cte1 (S) AS (
SELECT 1 FROM (VALUES (1), (1), (1), (1), (1), (1), (1), (1), (1), (1)) n (S)
),
cte2 (S) AS (SELECT 1 FROM cte1 AS cte1 CROSS JOIN cte1 AS cte2),
cte3 (S) AS (SELECT 1 FROM cte1 AS cte1 CROSS JOIN cte2 AS cte2)

select distinct cast(result as date) result from
(SELECT TOP (DATEDIFF(day, @StartDate, @EndDate) + 1)
        result = DATEADD(day, ROW_NUMBER() OVER(ORDER BY S) - 1, @StartDate)
FROM cte3) as res

获取SQL Server中两个月之间的月末日期列表

4 个答案: