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 <litumelen...@gmail.com> wrote:
> This is my table...
>
> <http://postgresql.nabble.com/file/n5855074/screenshot.jpg>
>
> 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...
>
> * 0y/0m/0d 00:00:01.001*
>
> Is this possible??
> Thanks Advanced.
>
>
>
> --
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>
>
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