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Extract week from date
3+ messages / 2 participants
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* Extract week from date
@ 2009-05-18 14:41 Dani Castaños <dcastanos@androme.es>
  2009-05-18 14:54 ` Re: Extract week from date Filip Rembiałkowski <plk.zuber@gmail.com>
  0 siblings, 1 reply; 3+ messages in thread

From: Dani Castaños @ 2009-05-18 14:41 UTC (permalink / raw)
  To: pgsql-sql

Hi again,

I need to extract date grouped by week from an statistics table.

I was trying something like this:

SELECT total_duration, EXTRACT( week from date statistics_date )
FROM statistics_daily
GROUP BY EXTRACT( week from date statistics_date ), total_duration;

But it doesn't works... Neither:

SELECT total_duration, statistics_date
FROM statistics_daily
GROUP BY EXTRACT( day from statistics_date ), total_duration,
statistics_date;


How can it be done?


Note: statistics_date is a DATE data type column.

Regards.

--
Dani Castaños Sánchez
dcastanos@androme.es





^ permalink  raw  reply  [nested|flat] 3+ messages in thread

* Re: Extract week from date
  2009-05-18 14:41 Extract week from date Dani Castaños <dcastanos@androme.es>
@ 2009-05-18 14:54 ` Filip Rembiałkowski <plk.zuber@gmail.com>
  2009-05-18 15:19   ` Re: Extract week from date Dani Castaños <dcastanos@androme.es>
  0 siblings, 1 reply; 3+ messages in thread

From: Filip Rembiałkowski @ 2009-05-18 14:54 UTC (permalink / raw)
  To: Dani Castaños <dcastanos@androme.es>; +Cc: pgsql-sql

2009/5/18 Dani Castaños <dcastanos@androme.es>

> Hi again,
>
> I need to extract date grouped by week from an statistics table.
>
> I was trying something like this:
>
> SELECT total_duration, EXTRACT( week from date statistics_date )
> FROM statistics_daily
> GROUP BY EXTRACT( week from date statistics_date ), total_duration;
>
> But it doesn't works... Neither:
>
> SELECT total_duration, statistics_date
> FROM statistics_daily
> GROUP BY EXTRACT( day from statistics_date ), total_duration,
> statistics_date;
>
>
hmmm.. it's not clear what do you want.

why not just something like

SELECT  EXTRACT( week from statistics_date ) as week, SUM(
total_duration) as total_duration_sum
FROM statistics_daily GROUP BY 1;


?



-- 
Filip Rembiałkowski
JID,mailto:filip.rembialkowski@gmail.com
http://filip.rembialkowski.net/

^ permalink  raw  reply  [nested|flat] 3+ messages in thread

* Re: Extract week from date
  2009-05-18 14:41 Extract week from date Dani Castaños <dcastanos@androme.es>
  2009-05-18 14:54 ` Re: Extract week from date Filip Rembiałkowski <plk.zuber@gmail.com>
@ 2009-05-18 15:19   ` Dani Castaños <dcastanos@androme.es>
  0 siblings, 0 replies; 3+ messages in thread

From: Dani Castaños @ 2009-05-18 15:19 UTC (permalink / raw)
  To: 'Filip Rembiałkowski' <plk.zuber@gmail.com>; +Cc: pgsql-sql

Dow!!! You’re ok! I forgot the aggregator funciont SUM!

 

Thanks!

 

De: Filip Rembiałkowski [mailto:plk.zuber@gmail.com] 
Enviado el: lunes, 18 de mayo de 2009 16:54
Para: Dani Castaños
CC: pgsql-sql@postgresql.org
Asunto: [?? Probable Spam] Re: [SQL] Extract week from date

 

 

2009/5/18 Dani Castaños <dcastanos@androme.es>

Hi again,

I need to extract date grouped by week from an statistics table.

I was trying something like this:

SELECT total_duration, EXTRACT( week from date statistics_date )
FROM statistics_daily
GROUP BY EXTRACT( week from date statistics_date ), total_duration;

But it doesn't works... Neither:

SELECT total_duration, statistics_date
FROM statistics_daily
GROUP BY EXTRACT( day from statistics_date ), total_duration,
statistics_date;


hmmm.. it's not clear what do you want. 

why not just something like

SELECT  EXTRACT( week from statistics_date ) as week, SUM(
total_duration) as total_duration_sum
FROM statistics_daily GROUP BY 1;



?



-- 
Filip Rembiałkowski
JID,mailto:filip.rembialkowski@gmail.com
http://filip.rembialkowski.net/

^ permalink  raw  reply  [nested|flat] 3+ messages in thread

end of thread, other threads:[~2009-05-18 15:19 UTC | newest]

Thread overview: 3+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2009-05-18 14:41 Extract week from date Dani Castaños <dcastanos@androme.es>
2009-05-18 14:54 ` Filip Rembiałkowski <plk.zuber@gmail.com>
2009-05-18 15:19   ` Dani Castaños <dcastanos@androme.es>

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