note 561 modified in mysql_query by ronabop

As is often discussed on the mailing list, a return of 0 to this command means an improperly written query. The query FAILED, not "succeeded but returned no rows". "mysql_query() would fail only if your query was invalid, for example, if you wrote it in invalid syntax ('delete foo in bar' instead of 'delete foo from bar'), or if it was semantically incorrect, e.g. if you used a field name in the WHERE clause that doesn't belong to the table. Zeev" http://www.php.net/manual/function.mysql-query.php