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Editorial Team
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Asked: 2026-06-05T11:24:25+00:00

Alright, I have never asked a question here before, but here goes. In my

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Alright, I have never asked a question here before, but here goes.

In my PHP script I currently have a query that retrieves all threads matching user ID in the threads_read table (records all read thread ids, Unix timestamp, and user ID). Then, I use another query to retrieve all the matching rows in an important_threads table that contains thread id.

This may be a very simple question to answer but I’m not too familiar with MySQL(i), but how would I make a query that retrieves all NON matching rows in an important_threads table?

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1 Answer

  1. Editorial Team

    You could do something like:

    SELECT * FROM threads_read WHERE id NOT IN (SELECT id FROM important_threads)

    That is a little resource heavy, but it does the job.

    I would really recommend against that type of a database structure, though. Simply marking a table called ‘threads’ that would have a column to see if it was read or important would be a much more fluent design.

    Best of luck!

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