*LeetCode Mysql 查找从来不购买的客户

Customers:

Id	Name
1	Joe
2	Henry
3	Sam
4	Max

Orders:

Id	CustomerId
1	3
2	1

Q:

• 根据Customers 和 Orders 表查找出从来没有发生购买行为的人

A:

select customers.name as "Customers"
from customers
where customers.id not in (
    select customerid from orders
);