LeetCode 0183 - Customers Who Never Order
LeetCode 0183 - Customers Who Never Order
Reck Zhang
发布于 2021-08-11 14:55:40
发布于 2021-08-11 14:55:40
文章被收录于专栏：Reck Zhang
Customers Who Never Order
Desicription
Suppose that a website contains two tables, the Customers table and the Orders table. Write a SQL query to find all customers who never order anything.
Table: Customers.
+----+-------+
| Id | Name |
+----+-------+
| 1 | Joe |
| 2 | Henry |
| 3 | Sam |
| 4 | Max |
+----+-------+Table: Orders.
+----+------------+
| Id | CustomerId |
+----+------------+
| 1 | 3 |
| 2 | 1 |
+----+------------+Using the above tables as example, return the following:
+-----------+
| Customers |
+-----------+
| Henry |
| Max |
+-----------+Solution
SELECT Name
AS Customers
FROM Customers
WHERE Id NOT IN
(SELECT CustomerId FROM Orders)本文参与 腾讯云自媒体同步曝光计划，分享自作者个人站点/博客。
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