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Editorial Team
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Asked: 2026-05-28T01:09:13+00:00

I want to execute something like this: UPDATE grades SET status=pass WHERE recno=123; However,

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I want to execute something like this:

  UPDATE grades SET status="pass" WHERE recno=123;

However, I want the user account doing the update to have write-only access to the database which means it does not have SELECT access. This causes the WHERE clause to fail.

If necessary, I can actually re-write the entire record, but recno is the primary key, which would cause the write to fail. Is there a way to do 

INSERT INTO grades (recno,name,status,...) VALUES (123, 'chemistry', 'pass',...)
  ON DUPLICATE KEY UPDATE <everything>;

or is this the wrong approach? Besides, it’s not the general solution to the “update a specific field in a specific record” problem.

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1 Answer

  1. Editorial Team

    That is a peculiar way to protect a table. It might make sense in some cases, though usually you want to provide some window of visibility so users are not blind to their effects on data.

    To completely implement a write-only database, use stored procedures. The procedures can have full access to the database, and users can be granted access only to stored procedures.

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