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From: Thiemo Kellner <[email protected]>
To: [email protected]
Subject: How do I check for NULL
Date: Tue, 9 Dec 2025 18:14:27 +0100 (GMT+01:00)
Message-ID: <[email protected]> (raw)
In-Reply-To: <CA+FnnTw=18Rba2XgceRUFKQo5P7Xf9QhXT6wKF=DgzYT6K9-sw@mail.gmail.com>
References: <CA+FnnTw=18Rba2XgceRUFKQo5P7Xf9QhXT6wKF=DgzYT6K9-sw@mail.gmail.com>

Hi

I believe there is a misconception. I feel, you meant to say, the subquery does not return any record which is not the same as returns NULL.

In any case, I suggest you to use the "insert select" construct, see examples in https://www.postgresql.org/docs/current/sql-insert.html, e.g. "NSERT INTO films SELECT * FROM tmp_films WHERE date_prod < '2004-05-07';"

Cheers

Thiemo

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