Re: Extract only maximum date from column
| От | Ron Johnson |
|---|---|
| Тема | Re: Extract only maximum date from column |
| Дата | |
| Msg-id | CANzqJaC9+koXCtuqKFxqZdsyHEk7J3QxOqF3UAwC0W2dEi-6sA@mail.gmail.com обсуждение исходный текст |
| Ответ на | Extract only maximum date from column (Rich Shepard <rshepard@appl-ecosys.com>) |
| Ответы |
Re: Extract only maximum date from column
|
| Список | pgsql-general |
On Thu, Dec 4, 2025 at 2:55 PM Rich Shepard <rshepard@appl-ecosys.com> wrote:
I want the script to extract only the maximum `next_contact' date and
haven't learned how to do this from my reading of web sites.
The script:
select p.person_nbr, p.company_nbr, c.next_contact
from people as p, contacts as c
where c.next_contact >= '2025-11-01'
group by p.person_nbr, p.company_nbr, c.next_contact
order by p.person_nbr, p.company_nbr, max(c.next_contact);
returns all contacts rather than only the latest one.
Is using a sub-select the proper way?
May not be the only way, but it's how I do it:
SELECT *
FROM foo
WHERE some_dt = (SELECT MAX(some_dt) FROM foo);
It might return more than one row...
Death to <Redacted>, and butter sauce.
Don't boil me, I'm still alive.
<Redacted> lobster!
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