题解 | #返回购买 prod_id 为 BR01 的产品的所有顾客的电子邮件(一)#
返回购买 prod_id 为 BR01 的产品的所有顾客的电子邮件(一)
http://www.nowcoder.com/practice/962b16554fbf4b99a87f4d68020c5bfb
SELECT a.cust_email FROM Customers as a left join Orders as b on a.cust_id = b.cust_id left join OrderItems as c on b.order_num = c.order_num WHERE prod_id = 'BR01'