这是一个复杂的查询，我使用它按分类法段塞对POST查询进行数字排序和过滤。

$my_post_type = \'some_post_type\';
$my_term_slug_to_be_used_for_Ordering = \'some_slug\';
$my_term_slug_to_be_used_for_Filtering = \'some_other_slug\';

$querystr = "
  SELECT 
   $wpdb->posts.*, $wpdb->term_relationships.object_id, 
   (SELECT wpt.slug
        FROM $wpdb->term_taxonomy wptt 
        INNER JOIN $wpdb->term_relationships wptr ON wptt.term_taxonomy_id = wptr.term_taxonomy_id
        INNER JOIN $wpdb->terms wpt ON wpt.term_id = wptt.term_id
        WHERE 
        wptr.object_id = $wpdb->term_relationships.object_id AND 
        wptt.taxonomy = \'my_term_slug_to_be_used_for_Ordering\') AS numeric_column_value

    FROM $wpdb->term_taxonomy INNER JOIN $wpdb->term_relationships ON $wpdb->term_taxonomy.term_taxonomy_id = $wpdb->term_relationships.term_taxonomy_id
         INNER JOIN $wpdb->posts ON $wpdb->posts.ID = $wpdb->term_relationships.object_id
         INNER JOIN $wpdb->terms ON $wpdb->terms.term_id = $wpdb->term_taxonomy.term_id
    WHERE 
         $wpdb->terms.slug = \'{$my_term_slug_to_be_used_for_Filtering}\' AND
         $wpdb->posts.post_type = \'$my_post_type\' AND $wpdb->posts.post_status = \'publish\'

    ORDER BY numeric_column_value * 1 DESC"; // Actually it is a string so, * 1 for numeric

$r = $wpdb->get_results($querystr, OBJECT);

当然，在orderby 参数，则有一个名为meta_value_num 这应该正是你想要的。

http://codex.wordpress.org/Class_Reference/WP_Query#Order_.26_Orderby_Parameters

$press = new WP_Query(array(
    \'posts_per_page\' => -1,
    \'post_type\'      => \'individual\',
    \'post_status\'    => \'private\',
    \'orderby\'        => \'meta_value_num\',
    \'meta_key\'       => \'individual-group\'
));