sum of days from some selected months Using sql query

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i have a table like this

id          Attendate
1	5/25/2012 12:00:00 AM
2	6/25/2012 12:00:00 AM
3	9/25/2012 12:00:00 AM
4	5/25/2012 12:00:00 AM
5	7/25/2012 12:00:00 AM
6	8/25/2012 12:00:00 AM
7	9/25/2012 12:00:00 AM
8	5/25/2012 12:00:00 AM
9	6/25/2012 12:00:00 AM
10	8/25/2012 12:00:00 AM

I want the sum of the days in the months(Calendar days) from that table

I want the output:

HI ,Actually I need to add The repeating months only once ;Means i need days of distinct month;
Eg:There is only 5 months,
5 may
6 June
7 July
8 August
9 September

I need the sum of these months ,

Which means the distinct month of dates provided in the table

Posted 13-Jul-12 21:30pm

Nimisha Mary John

Updated 16-Jul-12 18:00pm

v3

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4 solutions

Solution 1

Try something like

SQL

SELECT DATEDIFF(
(select top 1 AttenDate from myTable orderby AttenDate Desc)
(select top 1 AttenDate from myTable orderby AttenDate Asc)
GETDATE()) AS NumberOfDays 

This should give you the difference between the maximum and minimum dates in your table.

You could optimize this query by using JOIN. You can try that out for yourself.

Posted 13-Jul-12 21:50pm

Abhinav S

Solution 2

Try:

SQL

SELECT SUM(DATEDIFF(DAY, DATEADD(DAY, 1 - DAY(Attendate), Attendate),
                         DATEADD(MONTH, 1, DATEADD(DAY, 1 - DAY(Attendate), Attendate))))
FROM MyTable

Posted 13-Jul-12 21:51pm

OriginalGriff

Comments

sandeep nagabhairava 17-Jul-12 2:11am

my 5!

Solution 3

SQL

select datediff(day,(select top 1 Attendate from  table order by Attendate asc) ,(select top 1 Attendate from table  order by Attendate desc))

Posted 14-Jul-12 0:54am

Vasim889

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Nimisha Mary John · Accepted Answer · 2012-07-16T21:29:00

DECLARE @totaldays TABLE (months int)
declare @Days bigint
declare @count int
set @count=5
INSERT INTO @totaldays (months)
select distinct(Month(Attendate)) from pr_empdailyattendance where deptid=2 and finyearid=11

SELECT SUM(DATEDIFF(DAY, DATEADD(DAY, 1 - DAY(months), months),
DATEADD(MONTH, 1, DATEADD(DAY, 1 - DAY(months), months))))
FROM @totaldays