how to ignore the topic for this query and keep messages

as ignoring the issues and keep only the answers
I have this query


[code]global $smcFunc, $scripturl, $sourcedir, $modSettings, $user_info, $settings, $context;
   global $vpb_start, $vpb_total;

   $posts_result = $smcFunc['db_query']('', '
            SELECT u...

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