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From: Rich Shepard <[email protected]>
To: [email protected] <[email protected]>
Subject: Re: Extract only maximum date from column
Date: Thu, 4 Dec 2025 12:22:31 -0800 (PST)
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAKFQuwZEWkgQeWSB7nqzBjHS8kP7kvouT6jhKvfe_G2e3cJvOQ@mail.gmail.com>
References: <[email protected]>
	<CAKFQuwZEWkgQeWSB7nqzBjHS8kP7kvouT6jhKvfe_G2e3cJvOQ@mail.gmail.com>

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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