Re: selecting records by timestamp (date)

maybe the postgres version in the server is different

On 2/28/06, Jovan Kostovski <chom_devel(at)yahoo(dot)com> wrote:
>
> Hi,
>
> I have the following table running on postgres 8.04:
>
> CREATE TABLE ValueLog
> (
> idValueLog int4 NOT NULL DEFAULT nextval ('
> public.idValueLog_seq'::text),
> PPx integer,
> iValue integer DEFAULT -1,
> fValue real DEFAULT -1,
> t_tag timestamp without time zone,
> t_arr timestamp without time zone,
> cot integer,
> ack boolean,
> blk boolean,
> qd_iv boolean,
> qd_nt boolean,
> qd_sb boolean,
> qd_bl boolean,
> qd_ov boolean,
> CONSTR AINT idValueLog PRIMARY KEY (idValueLog)
> )
> WITHOUT OIDS;
> ALTER TABLE ValueLog OWNER TO $admin_user;"
>
> I've created the following SQL statement to select the records newer then
> a given date:
>
> select almvalue.almname , ppoint.ppdimstr, valuelog.ack, valuelog.blk,
> to_char(valuelog.t_arr,'DD.MM.YYYY HH24:MI:SS') from ppoint, valuelog,
> almvalue where ppoint.ppx = valuelog.ppx and almvalue.almvalue =
> valuelog.ivalue and valuelog.ppx = $db_ppx and to_char(valuelog.t_arr,'YYYYMMDD')
> >= '$ts
>
> $ts is a string, the date value input by the user and formated YYYYMMDD
>
> I've developed the web site on my Ubuntu box, but when I uploaded the site
> on the server Fedora Core 3, I had problems with the date filtering. Running
> psql on the server I've noticed that there were more data in the select *
> from value log results, field t_arr something like MM-DD-YYYY-dsfsdfd
> (something else which I don't know what it is)
> I think that the local time settings on the server makes me the troubles.
>
> What's the solution?
>
> I've even checked the result of:
> select to_char(valuelog.t_arr,'DD.MM.YYYY HH24:MI:SS') from valuelog;
>
> but instead of data I got empty data set. Why?
>
> What's the best way to do filtering (selecting) data by time?
>
> TIA, Jovan
>
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--
Atte. Rodrigo A. Llanos N.

Saludos.