Re: histogram - Mailing list pgsql-general

From Thomas Markus
Subject Re: histogram
Date
Msg-id 4DBC3D7B.804@proventis.net
Whole thread Raw
In response to histogram  (Joel Reymont <joelr1@gmail.com>)
Responses Re: histogram
Re: histogram
Re: histogram
List pgsql-general
Hi,

try something like this:

select
     trunc(random() * 10.)/10.
     , count(*)
from
     generate_series(1,2000000)
group by 1 order by 2

regards
Thomas

Am 30.04.2011 18:37, schrieb Joel Reymont:
> I have a column of 2 million float values from 0 to 1.
>
> I would like to figure out how many values fit into buckets spaced by 0.10, e.g. from 0 to 0.10, from 0.10 to 0.20,
etc.
>
> What is the best way to do this?
>
>     Thanks, Joel
>
> --------------------------------------------------------------------------
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