Subject Re: [firebird-support] datetime trunc
Author Ismael L. Donis Garcia
Post date 2014-02-11T20:01:04Z
SELECT CAST(CURRENT_TIMESTAMP as DATE) || ' ' || EXTRACT(HOUR FROM CURRENT_TIMESTAMP) || ':00:00' as date1
FROM RDB$DATABASE
Best Regard
========
| ISMAEL |
========
----- Original Message -----
Sent: Tuesday, February 11, 2014 2:20 PM
Subject: Re: [firebird-support] datetime trunc

 

On 11-2-2014 16:06, Virna Constantin wrote:
>
>
> EXTRACT()
> http://www.firebirdsql.org/refdocs/langrefupd25-intfunc-extract.html

Extract is not the same as PostgreSQL date_trunc. Extract returns the
requested value as an integer, while date_trunc returns a DATE or
TIMESTAMP truncated to the requested date field, example from
http://www.postgresql.org/docs/current/static/functions-datetime.html#FUNCTIONS-DATETIME-TRUNC
:

SELECT date_trunc('hour', TIMESTAMP '2001-02-16 20:38:40');
Result: 2001-02-16 20:00:00

SELECT date_trunc('year', TIMESTAMP '2001-02-16 20:38:40');
Result: 2001-01-01 00:00:00

> On Tuesday, February 11, 2014 4:42 PM, Maximiliano Robaina
> <maxi_robaina@...> wrote:
>
> Hi,
>
> Is there an equivalent function to trunc datetime fields in firebird ?
> Something like date_trunc in postgre [1]