Easiest way to populate a temp table with dates between and including 2 date parameters

Question

What is the easiest way to populate a temp table with dates including and between 2 date parameters. I only need the 1st day of the month dates.

So for example if @S

Answer 1

Solution:

DECLARE  @StartDate DATETIME
        ,@EndDate DATETIME;

SELECT   @StartDate = '20110105'
        ,@EndDate = '20110815';

SELECT  DATEADD(MONTH, DATEDIFF(MONTH, 0, DATEADD(MONTH, v.number, @StartDate)), 0) AS FirstDay
--or Andriy M suggestion:
--SELECT    DATEADD(MONTH, DATEDIFF(MONTH, 0, @StartDate) + v.number, 0) AS FirstDay
INTO    #Results
FROM    master.dbo.spt_values v
WHERE   v.type = 'P'        
AND     DATEDIFF(MONTH, @StartDate, @EndDate) >= v.number;

SELECT  *
FROM    #Results;

DROP TABLE #Results;

Results:

FirstDay
-----------------------
2011-01-01 00:00:00.000
2011-02-01 00:00:00.000
2011-03-01 00:00:00.000
2011-04-01 00:00:00.000
2011-05-01 00:00:00.000
2011-06-01 00:00:00.000
2011-07-01 00:00:00.000
2011-08-01 00:00:00.000