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From: Roger Mason <[email protected]>
To: pgsql-novice <[email protected]>
Subject: Re: select from grouped data
Date: Sat, 28 Aug 2021 10:38:41 -0230
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAOuzzgpa7+octXt69xQZ7x_w_ppRdUHAGTtBDGKoiTgk2LPvaA@mail.gmail.com>
References: <[email protected]>
	<[email protected]>
	<CAOuzzgpa7+octXt69xQZ7x_w_ppRdUHAGTtBDGKoiTgk2LPvaA@mail.gmail.com>


Stephen Frost writes:

>
> It’s generally better as it follows the SQL standard and is more flexible
> as it allows you to get top-N, as I said. DISTINCT ON has always been a
> hack and its use should be discouraged at this point.
>
> When an UPSERT capability exists in the actual standard then it’s use
> should be promoted over other hacks that various vendors have implemented
> also.

OK, thanks, I've filed this discussion away for future reference.
Meanwhile I'm having trouble getting this function to work as a
trigger.  I'll start another thread on that.

Thanks again.

Roger

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