cant order NULL value properly (mysql)
SELECT 
   `vote_question_totals`.`question_id`, 
    COALESCE(question_total_score,0) AS `score`, 
   `question`.* 
FROM 
   `vote_question_totals` RIGHT JOIN `question` 
        ON vote_question_totals.question_id = question.question_id 
ORDER BY 
   `score` DESC