Get the difference between two timestamp cells but in a special format in PostgreSQL

You may be looking for to_char:

# select to_char( now() - '2015-06-25', 'YYYY-MM-DD HH24:mm:ss' );

to_char
---------------------
0000-00-00 15:00:43
(1 row)

http://www.postgresql.org/docs/9.4/static/functions-formatting.html

On Wed, Jun 24, 2015 at 9:11 PM, litu16 <litumelendez@gmail.com> wrote:

(But don't use my format string, it's very wrong!)

On Thu, Jun 25, 2015 at 3:20 PM, Colin Lieberman <clieberman@turnitin.com>
wrote:

On 06/24/2015 09:11 PM, litu16 wrote:

This is my table...

<http://postgresql.nabble.com/file/n5855074/screenshot.jpg&gt;

I would like to get the time difference between 'time_type = Lap' AND
'time_type = Start' in order to fill 'time_elapse'. Im almost sure that this
code works...

* CREATE OR REPLACE FUNCTION timediff()
RETURNS trigger AS
$BODY$
DECLARE
t_ix real;

BEGIN
IF NEW.time_type = 'Lap' THEN
SELECT t.time FROM table_ebscb_spa_log04 t WHERE t.fn_name =
NEW.fn_name AND t.time_type = 'Start' ORDER BY t.stmtserial DESC LIMIT 1
INTO t_ix;
IF NOT FOUND THEN
RAISE EXCEPTION USING MESSAGE = 'There is not any previous
row...';
ELSE
NEW.time_elapse := t_ix - NEW.time;
END IF;
END IF;
return NEW;
END
$BODY$
LANGUAGE plpgsql VOLATILE*

But I don't know how to get the time difference between the two timestamps
cells in a special format: (years/months/days
hours:minutes:seconds:miliseconds) like this...

Well subtracting two timestamps gets you an interval:

http://www.postgresql.org/docs/9.4/interactive/functions-datetime.html

Table 9-27. Date/Time Operators

which you can convert:

http://www.postgresql.org/docs/9.4/interactive/functions-formatting.html

to_char(interval, text) text convert interval to string
to_char(interval '15h 2m 12s', 'HH24:MI:SS')

so:

postgres@production=# SELECT to_char(interval '15h 2m 12s', 'HH24:MI:SS');
to_char
----------
15:02:12
(1 row)

* 0y/0m/0d 00:00:01.001*

Is this possible??
Thanks Advanced.

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Adrian Klaver
adrian.klaver@aklaver.com

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Hi Adrian,

but I would like to get the time diff in this format

0years 0months 0days 00:00:00.000

not only hours, minutes, seconds.

is this possible???

Thanks Advanced.

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On 06/25/2015 08:23 PM, litu16 wrote:

Hi Adrian,

but I would like to get the time diff in this format

0years 0months 0days 00:00:00.000

not only hours, minutes, seconds.

is this possible???

Well age:

http://www.postgresql.org/docs/9.4/interactive/functions-datetime.html

does that sort of:

production=# SELECT age(timestamp '2015-06-26 09:15:15', timestamp
'2015-06-26 02:16:00');
age
----------
06:59:15
(1 row)

production=# SELECT age(timestamp '2015-06-26 09:15:15', timestamp
'2015-06-20 02:16:00');
age
-----------------
6 days 06:59:15
(1 row)

production=# SELECT age(timestamp '2015-06-26 09:15:15', timestamp
'2014-06-20 02:16:00');
age
------------------------
1 year 6 days 06:59:15
(1 row)

Thanks Advanced.

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Adrian Klaver
adrian.klaver@aklaver.com

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Check the formatting functions documentation:
http://www.postgresql.org/docs/9.4/static/functions-formatting.html

# select to_char( now() - '2015-06-27 14:33:24'
, 'Y"years" MM"months" DD"days" HH:MI:SS"."MS' );

to_char
-------------------------------------
0years 00months 01days 06:24:59.381
(1 row)

On Fri, Jun 26, 2015 at 10:52 AM, Adrian Klaver <adrian.klaver@aklaver.com>
wrote: