SqL stored procedure to find the dates,month and days

Question

In SQL Server how to write the query to get the month in between the startdate and enddate, days(in month) for the Month , actual number of days in the month

startdate and enddate is passed as a input parameter , i need to know the number of months, actual days and the count of days in the month

eg :

Start date : 2012-04-02
End date :   2012-08-23

i need to get the result as,

Month      Days     ActualDays _ inMonth    
----------------------------------------------
04         29       30   - (The no of days on Apr'12 )
05         31       31    
06         31       31    
07         31       31    
08         31       31

04 -month
29 -(Frm startdate 2-Apr to till 30-Apr'12(Apr End))
30 - (The no of days on Apr'12 )

Answer 1

Here's a procedure to calculate the number of days in a month. I do not know what you mean by "actual days" or how that could be different.

if object_id('spMonthList') is not null
    drop procedure spMonthList
go
create procedure dbo.spMonthList(
    @start date
,   @end date)
as
; with  Months as
        (
        select  dateadd(month, datediff(month, 0, @start), 0) as MonthStart
        union all
        select  dateadd(month, 1, MonthStart)
        from    Months
        where   MonthStart < @end
        )
select  datepart(month, MonthStart) as Month
,       datediff(day, MonthStart, dateadd(month, 1, MonthStart)) as NumberOfDays
from    Months;
go
exec spMonthList '2012-04-01', '2012-08-01'

-->

Month  NumberOfDays
4      30
5      31
6      30
7      31
8      31

Example at SQL Fiddle.