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Editorial Team
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Asked: 2026-06-06T06:28:00+00:00

I use a query to delete about 9,000,000 rows but no rows deleted what

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I use a query to delete about 9,000,000 rows but no rows deleted what is the problem?

 DELETE FROM `messages` WHERE  last_change < 1332201600 && last_change !=0

//1332201600 is time stamp

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  1. Editorial Team

    Deleting 9 million rows from a large table may take a long time. No rows will be deleted until the entire command completes and the transaction is committed. You have to be patient.

    I would also check that your WHERE clause actually matches some rows. Try running this statement:

    SELECT *
FROM `messages`
WHERE last_change < 1332201600 && last_change !=0
LIMIT 10

    If this returns 10 rows (and it should if the information in your question is correct) then your original DELETE statement will delete at least those 10 rows.

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