183.从不订购的客户

题目

某网站包含两个表,Customers 表和 Orders 表。编写一个 SQL 查询,找出所有从不订购任何东西的客户。

Customers 表:

+----+-------+
| Id | Name  |
+----+-------+
| 1  | Joe   |
| 2  | Henry |
| 3  | Sam   |
| 4  | Max   |
+----+-------+

Orders 表:

+----+------------+
| Id | CustomerId |
+----+------------+
| 1  | 3          |
| 2  | 1          |
+----+------------+

例如给定上述表格,你的查询应返回:

+-----------+
| Customers |
+-----------+
| Henry     |
| Max       |
+-----------+

来源:力扣(LeetCode) 链接:https://leetcode-cn.com/problems/customers-who-never-order 著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。

实现

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