| From: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
|---|---|
| To: | Luca Ferrari <fluca1978(at)gmail(dot)com> |
| Cc: | Vijaykumar Jain <vijaykumarjain(dot)github(at)gmail(dot)com>, pgsql-general <pgsql-general(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: order by <tablename> |
| Date: | 2021-06-10 08:58:18 |
| Message-ID: | CA+hUKGJmwxnRYO2uDjAm5pAtskfWMWoUfeP-QYw0h1B7AcEfnQ@mail.gmail.com |
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| Lists: | pgsql-general |
On Thu, Jun 10, 2021 at 8:40 PM Luca Ferrari <fluca1978(at)gmail(dot)com> wrote:
> On Thu, Jun 10, 2021 at 10:15 AM Vijaykumar Jain
> > when you provide a table in query in the order by clause, it is
> > ordered by cols of that table in that order.
>
> Clever, thanks!
> I also realized that this "table to tuples" expansion works for GROUP BY too.
> However, I'm not able to find this documented in GROUP BY, WHERE,
> ORDER BY clauses sections into select documentation
> <fgrouphttps://www.postgresql.org/docs/12/sql-select.html>. Could be
> my fault, of course.
There's something about this here:
https://www.postgresql.org/docs/13/rowtypes.html#ROWTYPES-USAGE
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