Ok, so there is actually two standards then. Is this documented
anywhere? Is this is something that is going to change? I don't want
to write and app and have things "break" during and upgrade :)
Thanks for the response.
On Mon, 5 Feb 2001, Karel Zak wrote:
>
> On Mon, 29 Jan 2001, Keith Perry wrote:
>
> > Greetings,
> >
> > I notice some talk about date problems and interestingly enough planning
> > out an application in which I will need to be able to manipulate dates.
> > I notice however that there seems to be a discrepancy with the day or
> > week in 7.0.3
> >
> > ---
> >
> > pmhcc=# select date_part('dow','now'::timestamp);
> > date_part
> > -----------
> > 1
> > (1 row)
> >
> > pmhcc=# select to_char('now'::timestamp,'D');
> > to_char
> > ---------
> > 2
> > (1 row)
> >
>
> See:
>
> test=# select date_part('dow','2001-02-11'::timestamp);
> date_part
> -----------
> 0
>
> test=# select to_char('2001-02-11'::timestamp, 'D');
> to_char
> ---------
> 1
>
>
> date_part is based on zero - use range 0-6
> to_char is based on one - use range 1-7
>
> Karel
>
