function to find difference between in days between two dates

Hello

PostgreSQL hasn't any official function for it. If you need it, you
can write own function

CREATE FUNCTION date_diff(date, date) returns integer as $$
select $1-$2; $$ language sql;

Regards
Pavel Stehule

2007/6/14, Ashish Karalkar <ashish.karalkar@info-spectrum.com>:

am Thu, dem 14.06.2007, um 11:56:15 +0530 mailte Ashish Karalkar folgendes:

Hello all,

Is there any function to find differences in days between two dates?

Yes, age().

Andreas
--
Andreas Kretschmer
Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -> Header)
GnuPG-ID: 0x3FFF606C, privat 0x7F4584DA http://wwwkeys.de.pgp.net

2007/6/14, A. Kretschmer <andreas.kretschmer@schollglas.com>:

am Thu, dem 14.06.2007, um 11:56:15 +0530 mailte Ashish Karalkar folgendes:

Hello all,

Is there any function to find differences in days between two dates?

Yes, age().

there is difference

date - date --> integer
age(date::timestamp, date::timestamp) --> interval

regards

Pavel

On Thu, Jun 14, 2007 at 09:00:12AM +0200, Pavel Stehule wrote:

Hello

PostgreSQL hasn't any official function for it. If you need it, you
can write own function

Not true. Anything that is done by an operator as actually done by a
function. So the function exists:

# \df date_mi
List of functions
Schema | Name | Result data type | Argument data types
------------+---------+------------------+---------------------
pg_catalog | date_mi | integer | date, date
(1 row)

You may have to dig through the pg_operator table to find it though.

Have a nice day,
--
Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/

2007/6/14, Martijn van Oosterhout <kleptog@svana.org>:

On Thu, Jun 14, 2007 at 09:00:12AM +0200, Pavel Stehule wrote:

Hello

PostgreSQL hasn't any official function for it. If you need it, you
can write own function

Not true. Anything that is done by an operator as actually done by a
function. So the function exists:

# \df date_mi
List of functions

I know about it, but it's undocumented

Pavel

On Thu, Jun 14, 2007 at 01:54:09PM +0200, Pavel Stehule wrote:

# \df date_mi

I know about it, but it's undocumented

Hrm, yet Bruce mentions it in one of his documents.

http://momjian.us/main/writings/pgsql/data_processing.pdf

It may be undocumented, but it get a lot of hits on google :)

Have a nice day,
--
Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/

Hrm, yet Bruce mentions it in one of his documents.

http://momjian.us/main/writings/pgsql/data_processing.pdf

It may be undocumented, but it get a lot of hits on google :)

why google? look to pgsql/src/backend/utils/adt/date.c :-)

Regards
Pavel Stehule