如何寫這個mysql查詢？

Question

我有三個表tb_poll，tb_poll_answer，tb_poll_votes

tb_poll有id,question

tb_poll_answer有id,poll_id,answer

tb_poll_votes有id,poll_answer_id

我想選擇所有的問題，這答案（包括票數）。

最後我想列出

Id Question   Answers 

1  Which is....?  1.PHP(70) 2.ASP(30) 3.JSP(2) 

2  ......    ....... 

如何寫在這裏最好的MySQL查詢？

Answer 1

最後我得到通過子查詢

SELECT q.id,q.question,av.vt,GROUP_CONCAT(CONCAT(av.answer,av.vt) SEPARATOR ' ') 
AS Answers FROM tb_poll AS q LEFT JOIN 
(SELECT a.answer,a.poll_id,COUNT(v.id) AS vt FROM tb_poll_answers AS a LEFT JOIN tb_poll_votes AS v ON a.id=v.poll_answer_id GROUP BY a.id) AS av 
ON q.id=av.poll_id 
GROUP BY q.id 

Answer 2

現在試試這個查詢：

SELECT q.id,q.question, 
     GROUP_CONCAT(CONCAT(a.id,'.',a.answer,COUNT(v.id) SEPARATOR ' ')) AS `Answers` 
FROM `tb_poll` AS q 
LEFT JOIN `tb_poll_answers` AS a 
    ON q.id = a.poll_id 
LEFT JOIN `tb_poll_votes` AS v 
    ON a.id = v.poll_answer_id 
WHERE 1 
GROUP BY q.id 
ORDER BY q.id