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