MySQL加入加數加加總和

Question

這是複雜的查詢，我希望能夠實現它一個語句，而不是必須在PHP中處理數組值。

爲了達到期望的輸出：

User Jobs Total 
John D. 5  $1245.67 
Mary L. 3  $800.56 

到目前爲止，這是查詢我：

SELECT 
    SUM(job.cost) AS sum, 
    COUNT(DISTINCT job.user) as count, 
    user.id, user.firstname, user.lastname 
FROM  `job` 
LEFT JOIN `user` ON job.user = user.id 
GROUP BY user.id 

但計數值是錯誤的：它是不同的用戶，所以當然每個人都會出錯。我該如何解決？

表user

id, name, etc. 

表job

id, user, cost 

一個user許多job

---

UPDATE

這似乎是工作的權利：

SELECT 
    SUM(job.cost) AS sum, 
    COUNT(1) as count, 
    user.id, user.firstname, user.lastname 
FROM `job` 
LEFT JOIN `user` ON job.user = user.id 
GROUP BY user.id 

Answer 1

SET @seq = 0; 

SELECT place FROM 

(SELECT 
    @seq := @seq + 1 AS place 
    SUM(job.cost) AS sum, 
    COUNT(1) as count, 
    user.id, user.firstname, user.lastname 
FROM  `job` 
LEFT JOIN `user` ON job.user = user.id 
GROUP BY user.id 
ORDER BY COUNT(1) DESC) 

AS list 
WHERE list.id = 'my_user_id'