重寫SQL查詢無子查詢

Question

我需要一些幫助的跟隨着MySQL查詢

我要重寫我的查詢，而無需任何的子查詢 - 但我不知道如何..

這是一個視頻租賃商店數據庫; ）

SELECT k.first_name, k.last_name, SUM(amount) AS profit 
FROM payment AS p 
JOIN (SELECT c.* FROM customer AS c 
JOIN rental AS r ON c.customer_id = r.customer_id 
WHERE r.return_date IS NULL GROUP BY c.customer_id HAVING 
COUNT(*) > '1') AS k ON p.customer_id = k.customer_id 
GROUP BY k.customer_id 
HAVING SUM(amount) > 100 
ORDER BY profit DESC; 

謝謝:)

Answer 1

這本：

SELECT c.first_name, c.last_name, c.customer_id,SUM(amount) AS profit 
FROM payment AS p 
    INNER JOIN (customer c 
     INNER join rental r 
     ON c.customer_id=r.customer_id) 
    ON p.customer_id = c.customer_id 
GROUP BY c.customer_id,c.last_name,c.first_name 
HAVING SUM(amount) > 100 
ORDER BY profit DESC; 

使用INNER JOIN將限制此查詢僅限於已付款的客戶。