183.(Easy)从不订购的客户
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
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Solution
select Name Customers
from Customers 
where Id not in (select CustomerId from Orders)Last updated
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