2010/4/14 Louis-David Mitterrand :
> On Wed, Apr 14, 2010 at 06:06:59PM +0200, Pavel Stehule wrote:
>> I don't understand well. Why you don't use a function date_trunc(),
>>
>> select date_trunc('week', created), count(*)
>> from price
>> group by date_trunc('week', created)
>
> Because if a price
On Wed, Apr 14, 2010 at 06:06:59PM +0200, Pavel Stehule wrote:
> I don't understand well. Why you don't use a function date_trunc(),
>
> select date_trunc('week', created), count(*)
> from price
> group by date_trunc('week', created)
Because if a price doesn't change for more than a week, then so
2010/4/14 Louis-David Mitterrand :
> On Wed, Apr 14, 2010 at 08:46:13AM -0700, Richard Broersma wrote:
>> On Wed, Apr 14, 2010 at 7:54 AM, Louis-David Mitterrand
>> wrote:
>>
>> > Now, I'd like to make a graph of average prices per week, per
>> > id_product. As some prices don't vary much, distrib
On Wed, Apr 14, 2010 at 08:46:13AM -0700, Richard Broersma wrote:
> On Wed, Apr 14, 2010 at 7:54 AM, Louis-David Mitterrand
> wrote:
>
> > Now, I'd like to make a graph of average prices per week, per
> > id_product. As some prices don't vary much, distribution would not be
> > ideal if I simply
On Wed, Apr 14, 2010 at 7:54 AM, Louis-David Mitterrand
wrote:
> Now, I'd like to make a graph of average prices per week, per
> id_product. As some prices don't vary much, distribution would not be
> ideal if I simply 'group by extract(week from p.modified)'.
I created a view for a similar prob
