Re: finding if a period is multiples of a given interval - Mailing list pgsql-general

On 01/28/2013 07:17 AM, c k wrote:

I know that. I have to check the period (dates entered by user) must be
correct and must be perfectly divisible by the interval given. This is a
pre-check for the interest calculation.

If user enters '01/04/2010' and '15/05/2010' as  the dates, and interval
as 'month' then, there are 15 days left and if the banking product is
set to calculate interest for a complete month only, then calculation
can result in wrong interest figures. So I have to check if given period
is perfectly divisible by the interval or not.

I changed the dates to match my date_style.

test=> select age('05/15/2010'::date ,'04/01/2010'::date)
test-> ;
      age
---------------
 1 mon 14 days
(1 row)

test=> select date_part('days', age('05/15/2010'::date ,'04/01/2010'::date));
 date_part
-----------
        14
(1 row)


test=> select age('06/01/2010'::date ,'04/01/2010'::date)
;
  age
--------
 2 mons
(1 row)

test=> select date_part('days', age('06/01/2010'::date ,'04/01/2010'::date));
 date_part
-----------
         0
(1 row)

Regards,
C P Kulkarni

--
Adrian Klaver
adrian.klaver@gmail.com