From: | hubert depesz lubaczewski <depesz(at)depesz(dot)com> |
---|---|
To: | Gary Stainburn <gary(dot)stainburn(at)ringways(dot)co(dot)uk> |
Cc: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: Most recent row |
Date: | 2017-05-05 09:35:05 |
Message-ID: | 20170505093505.GA5611@depesz.com |
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Thread: | |
Lists: | pgsql-sql |
On Fri, May 05, 2017 at 09:25:04AM +0100, Gary Stainburn wrote:
> This question has been asked a few times, and Google returns a few different
> answers, but I am interested people's opinions and suggestions for the *best*
> wat to retrieve the most recent row from a table.
>
> My case is:
>
> create table people (
> p_id serial primary key,
> ......
> );
>
> create table assessments (
> p_id int4 not null references people(p_id),
> as_timestamp timestamp not null,
> ......
> );
>
> select p.*, (most recent) a.*
> from people p, assessments a
> ..
> ;
How many rows are in people? How many in assessments? Do you really want
data on all people? Or just some?
Best regards,
depesz
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