該表與兩個相關表的總和

Question

我在這里（我確定是）這個簡單的問題，我不知道如何解決。

我有這個架構：

使用此數據：

我的預期結果是：

對於“ JOHN NASH”：

PERSON_NAME | TOTAL_FRUIT | TOTAL COOKIE
----------------------------------------
JOHN NASH   |       10    |     38  

對於“ OSCAR WILDE”：

PERSON_NAME | TOTAL_FRUIT | TOTAL COOKIE
----------------------------------------
OSCAR WILDE |       28    |      0

提前致謝。

Answer 1

SELECT name, IFNULL(f.total, 0) AS total_fruit, IFNULL(c.total, 0) AS total_cookie
FROM person AS p
LEFT JOIN (SELECT person_idperson, SUM(cost) AS total
           FROM fruit
           GROUP BY person_idperson) AS f
ON p.idperson = f.person_idperson
LEFT JOIN (SELECT person_idperson, SUM(cost) AS total
           FROM cookie
           GROUP BY person_idperson) AS c
ON p.idperson = c.person_idperson

Answer 2

SELECT p.name AS PERSON_NAME, 
    IFNULL(SUM(f.cost),0) AS TOTAL_FRUIT, 
    IFNULL(SUM(c.cost),0) AS TOTAL_COOKIE
FROM person AS p
LEFT JOIN fruit as f
    ON p.idperson = f.person_idperson
LEFT JOIN cookie as c
    ON p.idperson = c.person_idperson
GROUP BY p.idperson