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help / color / mirror / Atom feedFrom: Christophe Pettus <[email protected]>
To: Abhishek Hatgine <[email protected]>
Cc: [email protected]
Subject: Re: Feature Proposal: Column-Level DELETE Operation in SQL
Date: Wed, 23 Apr 2025 09:47:50 -0700
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAD2voTQMUmNCKBok-_HvYLqFNECRWNkvqPruq0NcsFgd6g-Odw@mail.gmail.com>
References: <CAD2voTQMUmNCKBok-_HvYLqFNECRWNkvqPruq0NcsFgd6g-Odw@mail.gmail.com>
> On Apr 21, 2025, at 09:53, Abhishek Hatgine <[email protected]> wrote:
> However, there’s no specific, expressive way to delete the value of a column directly. The typical workaround is to use:
> UPDATE Customers SET Address = NULL WHERE CustomerID = 103;
I'm not sure I agree that's unexpressive. When you consider the relational model, it's not clear to me what "deleting the value of a column" means. It could be:
1. Removing the current value, which begs the question of "replacing it with what?"
2. Dropping the column, for which we already have ALTER TABLE ... DROP COLUMN.
Can you give a bit more detail about what the state of the table is when you have "deleted the value of a column directly"?
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Subject: Re: Feature Proposal: Column-Level DELETE Operation in SQL
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