How to split date ranges based on months in SQL Server 2005 - sql

Question

Ex: date range is 01-01-2011 to 01-01-2012, I want the output like this :
01-01-2011 31-01-2011
01-02-2011 28-02-2011
How can I do this ? I'm using SQL Server 2005..
Thanks

Answer 1

Using CTE:
DECLARE #Begin DATETIME
DECLARE #End DATETIME
SELECT #Begin = '20110101', #End = '20120101'
;WITH ranges(DateFrom, DateTo) AS
(
SELECT #Begin, DATEADD(DAY, -1, DATEADD(MONTH, 1, #begin))
UNION ALL
SELECT DATEADD(month, 1, DateFrom), DATEADD(DAY, -1, DATEADD(MONTH, 2, DateFrom))
FROM ranges
WHERE DateFrom < #End
)
SELECT * FROM ranges
OPTION(MAXRECURSION 0)
And not using CTE:
DECLARE #Begin DATETIME
DECLARE #End DATETIME
SELECT #Begin = '20110101', #End = '20120101'
SELECT DATEADD(MONTH, n.Number, #Begin) DateFrom, DATEADD(day, -1, DATEADD(MONTH, n.Number+1, #Begin)) DateTo
FROM master.dbo.spt_values n
WHERE
n.Number < DATEDIFF(MONTH, #begin, #end)
AND n.Type = 'P'
If you need to include January 2012 too, use this
DECLARE #Begin DATETIME
DECLARE #End DATETIME
SELECT #Begin = '20110101', #End = '20120101'
SELECT DATEADD(MONTH, n.Number, #Begin) DateFrom, DATEADD(day, -1, DATEADD(MONTH, n.Number+1, #Begin)) DateTo
FROM master.dbo.spt_values n
WHERE
n.Number <= DATEDIFF(MONTH, #begin, #end)
AND n.Type = 'P'
And CTE:
DECLARE #Begin DATETIME
DECLARE #End DATETIME
SELECT #Begin = '20110101', #End = '20120101'
;WITH ranges(DateFrom, DateTo) AS
(
SELECT #Begin, DATEADD(DAY, -1, DATEADD(MONTH, 1, #begin))
UNION ALL
SELECT DATEADD(month, 1, DateFrom), DATEADD(DAY, -1, DATEADD(MONTH, 2, DateFrom))
FROM ranges
WHERE DATEADD(month, 1, DateFrom) < #End
)
SELECT * FROM ranges
OPTION(MAXRECURSION 0)

Answer 2

>On Providing the Start and End Date range, it can be split into months. This might help.
DECLARE #StartDate datetime
DECLARE #EndDate datetime
DECLARE #tmpStart datetime
DECLARE #tmpEnd datetime
Select #StartDate = '2012-01-01'
Select #EndDate = '2009-01-01'
Select #StartDate = DATEADD(MONTH,1,Convert(DATETIME,Convert(VARCHAR(25), Datepart (YEAR,#StartDate)) + '-' + Convert(VARCHAR(25), Datepart(MONTH, #StartDate)) + '-' + Convert(VARCHAR(25), 1)))
Select #EndDate = DATEADD(MONTH,1,Convert(DATETIME,Convert(VARCHAR(25), Datepart(YEAR, #EndDate)) + '-' + Convert(VARCHAR(25), Datepart(MONTH, #EndDate)) + '-' + Convert(VARCHAR(25), 1)))
Select #EndDate = DATEADD(DD,-1, DATEADD(MM,1,#EndDate))
Select #tmpEnd = #EndDate
Select #tmpStart = Convert(DATETIME,Convert(VARCHAR(25), Datepart(YEAR, #tmpEnd)) + '-' +
Convert(VARCHAR(25), Datepart(MONTH, #tmpEnd)) + '-' + Convert(VARCHAR(25), 1))
Select #StartDate 'Start' , #EndDate 'End'
While #tmpStart <= #StartDate
BEGIN
Select #tmpStart 'tmpStart' , #tmpEnd 'tmpEnd'
Select #tmpStart = DATEADD(MM,1,#tmpStart)
Select #tmpEnd = DATEADD(DD,-1,DATEADD (MM, 1 , #tmpStart))
END