| From: | Edson Carlos Ericksson Richter <richter(at)simkorp(dot)com(dot)br> |
|---|---|
| To: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> |
| Cc: | pgsql-general(at)lists(dot)postgresql(dot)org |
| Subject: | Re: PostgreSQL needs percentage function |
| Date: | 2017-12-18 17:08:14 |
| Message-ID: | a9885982-0939-c0c6-badc-32228b4874c3@simkorp.com.br |
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| Lists: | pgsql-general |
Em 18/12/2017 15:01, David G. Johnston escreveu:
> On Mon, Dec 18, 2017 at 9:56 AM, Edson Carlos Ericksson Richter
> <richter(at)simkorp(dot)com(dot)br <mailto:richter(at)simkorp(dot)com(dot)br>>wrote:
>
> But, is it possible to have a aggregate function that calculates
> de percent from the sum (and/or count) total (as a value from 0
> ... 1) for numeric (or double)?
>
>
> Do you mean:
>
> SELECT id, val, val / (sum(val) OVER ())
> FROM vals;
>
> David J.
>
I've never thought about Window Functions that way.
Thanks, it is enligthning.
:-)
Regards,
Edson.
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