Search Postgresql Archives

Re: histogram

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]



hi,

group by 1 means group by first output column
order by 2 means order by second output column ascending



Am 30.04.2011 19:00, schrieb Joel Reymont:
What is the meaning of
	
	group by 1 order by 2

e.g. what to the numbers 1 and 2 stand for?

What would change if I do the following?

	group by 1 order by 1

On Apr 30, 2011, at 5:48 PM, Thomas Markus wrote:

Hi,

try something like this:

select
    trunc(random() * 10.)/10.
    , count(*)
from
    generate_series(1,2000000)
group by 1 order by 2
--------------------------------------------------------------------------
- for hire: mac osx device driver ninja, kernel extensions and usb drivers
---------------------+------------+---------------------------------------
http://wagerlabs.com | @wagerlabs | http://www.linkedin.com/in/joelreymont
---------------------+------------+---------------------------------------





--
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general


[Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Programming PHP]     [Kernel Newbies]     [PHP Classes]     [Find Someone Nice]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]

Add to Google Powered by Linux