Re: "reverse" (?) UPSERT -- how to ?

Am Sat, Feb 17, 2024 at 08:55:57AM -0800 schrieb Adrian Klaver:

> >Dear list members,
> >
>
> >So, is this doable within one SQL statement (short of
> >creating and running the abovementioned function in
> >one go ;-) ?
>
> Don't know what version of Postgres you are on, assuming 15+ then maybe?:

Ah, sorry, I omitted that detail :(

Release target for new installs is current Debian Stable, IOW
Bookworm, which has PG 15.

postgresql:
Installiert: 15+248
Installationskandidat: 15+248
Versionstabelle:
16+257 500
500 https://deb.debian.org/debian testing/main i386 Packages
*** 15+248 990
990 https://deb.debian.org/debian bookworm/main i386 Packages
100 /var/lib/dpkg/status

However, legacy deployments may run, say PG 13,

root(at)hermes:~/bin# rmadison postgresql
postgresql | 11+200+deb10u5 | oldoldstable | all
postgresql | 13+225+deb11u1 | oldstable | all
postgresql | 15+248 | stable | all
postgresql | 16+257 | testing | all
postgresql | 16+257 | unstable | all

so ideally it would work on that, too. However, it does not
seem too much to ask to *upgrade* GNUmed database servers to
Debian *Stable* if on plans on running the next,
as-yet-unreleased version ;-)

> MERGE
>
> https://www.postgresql.org/docs/current/sql-merge.html

:-) I knew I missed something. As Greg also pointed out
that is what I need.

Thanks !
Karsten
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