Re: Problem with Day of Week

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
>