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Editorial Team
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Asked: 2026-05-25T03:20:57+00:00

Just a simple question, is this a valid MySQL query? In particular, the AND

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Just a simple question, is this a valid MySQL query? In particular, the AND statement.

"UPDATE table SET field1 = 5,field2 = 10 WHERE field3 = 20 AND field4 = 40"

When I execute this, it returns that 0 rows were affected when the entry definitely exists and should have been updated.

Thanks in advance!

edit: Ah, I’m using mysql_affected_rows afterwards…does this not work for UPDATE queries? Is there a way to find out whether any records were updated?

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1 Answer

  1. Editorial Team

    Take the WHERE part from your UPDATE and try running using it with a SELECT. Like:

    SELECT * FROM table WHERE field3 = 20 AND field4 = 40

    Any row(s) now?

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