Is it possible to display months between two dates in sql using a single select statement without using temp tables [duplicate] - sql

Question

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Months between two dates
I have date range as [start date] = '2012-09-01' and [finish date] = '2014-01-01'
Now, I need to display months between two dates..using a single select statement
Expected Output :
9
10
11
12
1
2
3
.
.
.
12
1
How can I do this?

Answer 1

DECLARE #StartDate DATETIME,
#EndDate DATETIME;
SELECT #StartDate = '20120901'
,#EndDate = '20140101';
;WITH MONTHS (date)
AS
(
SELECT #StartDate
UNION ALL
SELECT DATEADD(MONTH,1,date)
FROM MONTHS
WHERE DATEADD(MONTH,1,date)<=#EndDate
)
SELECT MONTH(date) AS MONTH FROM MONTHS
Result:
MONTH
-----------
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
(17 row(s) affected)
EDIT:
As per your updated requirement you can achieve this using following query:
DECLARE #StartDate DATETIME,
#EndDate DATETIME;
SELECT #StartDate = '20120901'
,#EndDate = '20140101';
SELECT MONTH(DATEADD(MONTH, x.number, #StartDate)) AS Months
FROM master.dbo.spt_values x
WHERE x.type = 'P'
AND x.number <= DATEDIFF(MONTH, #StartDate, #EndDate);
Result:
Months
-----------
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
(17 row(s) affected)

Answer 2

You can user table variables also:
DECLARE #startdt DATETIME, #enddt DATETIME
SELECT #startdt = '2012-09-01', #enddt = '2014-01-01'
DECLARE #Months TABLE (Months INT)
INSERT INTO #Months VALUES (MONTH(#startdt))
WHILE #startdt < #enddt
BEGIN
SET #startdt = DATEADD(MONTH,1,#startdt)
INSERT INTO #Months VALUES (MONTH(#startdt))
END
SELECT * FROM #Months