Re: Extract only maximum date from column

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