| From: | Rafael Martinez <r(dot)m(dot)guerrero(at)usit(dot)uio(dot)no> |
|---|---|
| To: | Miguel Angel Hernandez Moreno <miguel(dot)hdz(dot)mrn(at)gmail(dot)com> |
| Cc: | Gunnar Wolf <gwolf(at)gwolf(dot)org>, Lista PostgreSql <pgsql-es-ayuda(at)postgresql(dot)org> |
| Subject: | Re: convertir fecha a interval definido |
| Date: | 2011-02-11 10:27:30 |
| Message-ID: | 4D550F12.3050405@usit.uio.no |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-es-ayuda |
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Miguel Angel Hernandez Moreno wrote:
>
> $ SELECT EXTRACT( epoch FROM ( '1970-01-01'::timestamp +
> ( '2011-02-10 15:56:39'::timestamp -
> '2011-02-02 15:56:39'::timestamp)));
> date_part
> -----------
> 712800
> (1 row)
>
El intervalo entre '2011-02-10 15:56:39' y '2011-02-02 15:56:39' es 8
dias, o lo que es lo mismo 691200 segundos.
El comando sql de arriba no da el resultado correcto. Segun la
documentacion, EXTRACT(EPOCH FROM INTERVAL) nos da el numero exacto de
segundos en el intervalo definido.
Este comando retorna el numero de segundos exactos:
SELECT EXTRACT(EPOCH FROM('2011-02-10 15:56:39'::timestamp - '2011-02-02
15:56:39'::timestamp)::interval);
- --
Rafael Martinez, <r(dot)m(dot)guerrero(at)usit(dot)uio(dot)no>
Center for Information Technology Services
University of Oslo, Norway
PGP Public Key: http://folk.uio.no/rafael/
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