| From: | Ron <ronljohnsonjr(at)gmail(dot)com> |
|---|---|
| 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: Converting row elements into a arrays? |
| Date: | 2023-03-02 21:46:51 |
| Message-ID: | cada9253-607a-498b-9a59-b61dd7717784@gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
On 3/2/23 15:34, David G. Johnston wrote:
> On Thu, Mar 2, 2023 at 1:58 PM Ron <ronljohnsonjr(at)gmail(dot)com> wrote:
>
> Postgresql 12.13
>
> Given the sample below, I'm looking for how to generate this output.
> It's
> like GROUP BY, but generating an array instead of an aggreate number.
>
>
> Group By creates groups, that's it. How you aggregate the data that are
> in those groups is determined by which function you call. Sure, a
> function like "count()" produces a single number, but there are other
> functions. Even a whole documentation section listing them.
>
> https://www.postgresql.org/docs/current/functions-aggregate.html
>
> David J.
>
I'm used to the bog standard COUNT, AVG, MIN, MAX, SUM. It didn't occur to
me that there would be others...
--
Born in Arizona, moved to Babylonia.
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Ron | 2023-03-02 21:49:13 | Re: Converting row elements into a arrays? |
| Previous Message | Rob Sargent | 2023-03-02 21:45:49 | Re: Converting row elements into a arrays? |