Feedback-ID: i76984098:Fastmail
Message-ID: <607f12e8-8c82-40f2-85b4-766cfee27261@aklaver.com>
Date: Thu, 4 Dec 2025 14:33:23 -0800
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: Extract only maximum date from column
To: Rich Shepard <rshepard@appl-ecosys.com>,
 "pgsql-general@postgresql.org" <pgsql-general@postgresql.org>
References: <db81f086-e1a5-5798-f9bd-5bed5b1bc7f4@appl-ecosys.com>
 <CAKFQuwZEWkgQeWSB7nqzBjHS8kP7kvouT6jhKvfe_G2e3cJvOQ@mail.gmail.com>
 <54638724-615f-52f-29a6-74e2567b9599@appl-ecosys.com>
 <722e065d-8c21-4012-9752-b43658a99c9c@aklaver.com>
 <d28add7e-d21c-4355-e074-2152b7ac5562@appl-ecosys.com>
Content-Language: en-US
From: Adrian Klaver <adrian.klaver@aklaver.com>
In-Reply-To: <d28add7e-d21c-4355-e074-2152b7ac5562@appl-ecosys.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
Archived-At: <https://www.postgresql.org/message-id/607f12e8-8c82-40f2-85b4-766cfee27261%40aklaver.com>
Precedence: bulk

On 12/4/25 14:17, Rich Shepard wrote:
> On Thu, 4 Dec 2025, Adrian Klaver wrote:
> 

> So, tweaking from reported errors:
> WITH lc AS (SELECT p.person_nbr, max(c.next_contact) AS last_contact
>       from people as p, contacts as c
>       where next_contact >= '2025-11-01'
>       group by p.person_nbr)
> select p.person_nbr, p.company_nbr, lc.last_contact
> from people AS p
> join lc on p.person.nbr = lc.person_nbr;
> 
> psql:companies-contacted-2025.sql:9: ERROR:  missing FROM-clause entry 
> for table "person"
> LINE 7: join lc on p.person.nbr = lc.person_nbr;

My mistake should be p.person_nbr

>                     ^
> This is obviously a much more complicated query than I expected.
> 
> Thanks,
> 
> Rich
> 
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com