Re: Selecting the most recent timestamptz

From: Alexander Farber <alexander(dot)farber(at)gmail(dot)com>
To:
Cc: pgsql-general <pgsql-general(at)postgresql(dot)org>
Subject: Re: Selecting the most recent timestamptz
Date: 2018-02-22 09:24:00
Message-ID: CAADeyWgREH7Xv1OaTOC7BCi8dFcwZr3vQuzLmemtv1J8z1obRQ@mail.gmail.com
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Ahh, thank you Laurenz -

On Thu, Feb 22, 2018 at 10:18 AM, Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>
wrote:

>
> You are only checking if there is a later timestamp *for the same "mid"*.
>
> Since the two rows have different "mid", they are not compared.
>

no it works -

# select m.played, m.mid, m.action, m.gid, m.uid from words_moves m where
gid=10 and not exists (select 1 from words_moves x where m.gid=x.gid AND
x.played > m.played);
played | mid | action | gid | uid
-------------------------------+-----+--------+-----+-----
2018-02-20 15:06:01.430634+01 | 216 | expire | 10 | 11
(1 row)

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