Re: interval as hours or minutes ?

On 7 Feb 2007 at 19:03, Aarni Ruuhimäki wrote:

> Hi all,
>
> Could anyone please tell an easy way to get total hours or minutes from an
> interval ?
>
> SELECT SUM(stop_date_time - start_date_time) AS tot_time FROM work_times WHERE
> user_id = 1;
> tot_time
> -----------------
> 2 days 14:08:44
>
> I'd like to have this like ... AS tot_hours ...
> tot_hours
> -----------------
> 62
>
> and ... AS tot_minutes ...
> tot_minutes
> -----------------
> 3728
>
> Maybe even ... AS tot_hours_minutes_seconds
> tot_hours_minutes_seconds
> -----------------
> 62:08:44
>
>
> start_date_time and stop_date_time are stored as timestamp without time zone,
> using Pg 8.1.5 on CentOs 4.4

select extract(epoch from (timestamp '2007-02-07 16:24:00' - timestamp '2007-02-05
13:00:00')) as num_seconds;

num_seconds
------------
185040
(1 row)

select (extract(epoch from (timestamp '2007-02-07 16:24:00' - timestamp '2007-02-05
13:00:00')) * interval '1 second') as hours_minutes_seconds;

hours_minutes_seconds
-----------------------
51:24:00
(1 row)

select extract(epoch from (timestamp '2007-02-07 16:24:00' - timestamp '2007-02-05
13:00:01'))/60 as minutes;

minutes
------------------
3083.98333333333
(1 row)

select round(extract(epoch from (timestamp '2007-02-07 16:24:00' - timestamp '2007-02-05
13:00:01'))/60) as minutes;

minutes
---------
3084
(1 row)

select round(extract(epoch from (timestamp '2007-02-07 16:24:00' - timestamp '2007-02-05
13:00:01'))/360) as hours;

hours
-------
514
(1 row)