183. 从不订购的客户
183. 从不订购的客户
SQL架构
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 |
+-----------+代码如下：
# Write your MySQL query statement
SELECT
NAME AS Customers
FROM
Customers
WHERE
Id NOT IN (
SELECT
Customers.Id
FROM
Customers
RIGHT JOIN Orders ON Customers.Id = Orders.CustomerId
);