| From: | Rich Shepard <rshepard(at)appl-ecosys(dot)com> |
|---|---|
| To: | "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Extract only maximum date from column |
| Date: | 2025-12-04 20:22:31 |
| Message-ID: | 71e7ffd-2151-cf3c-b1d9-5b8d66bb9b6@appl-ecosys.com |
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| Lists: | pgsql-general |
On Thu, 4 Dec 2025, David G. Johnston wrote:
> I would go with a lateral join subquery of the contracts table. Using an
> aggregates to perform ranking is an anti-pattern. You want the contract
> ranked first when ordered by contract_date. Either use a window function
> to explicitly rank the contracts or use a limit/fetch clause to simply
> return the first ordered one.
David,
It's 'contacts' rather than 'contracts'; a minor typo.
I'll read on making a lateral join. Thanks.
> You also seem to have completely missed joining people to contracts -
> suggest using explicit “join” clauses to make that error less likely.
Oops! My bad. Fixed.
Regards,
Rich
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