1 Star 0 Fork 18

zcc/力扣题库(完整版)

加入 Gitee
与超过 1200万 开发者一起发现、参与优秀开源项目,私有仓库也完全免费 :)
免费加入
文件
克隆/下载
customers-who-never-order.html 1.44 KB
一键复制 编辑 原始数据 按行查看 历史
小墨 提交于 2023-12-09 18:42 +08:00 . 存量题库数据更新
<p>Table: <code>Customers</code></p>
<pre>
+-------------+---------+
| Column Name | Type |
+-------------+---------+
| id | int |
| name | varchar |
+-------------+---------+
id is the primary key (column with unique values) for this table.
Each row of this table indicates the ID and name of a customer.
</pre>
<p>&nbsp;</p>
<p>Table: <code>Orders</code></p>
<pre>
+-------------+------+
| Column Name | Type |
+-------------+------+
| id | int |
| customerId | int |
+-------------+------+
id is the primary key (column with unique values) for this table.
customerId is a foreign key (reference columns) of the ID from the Customers table.
Each row of this table indicates the ID of an order and the ID of the customer who ordered it.
</pre>
<p>&nbsp;</p>
<p>Write a solution to find all customers who never order anything.</p>
<p>Return the result table in <strong>any order</strong>.</p>
<p>The result format is in the following example.</p>
<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
<pre>
<strong>Input:</strong>
Customers table:
+----+-------+
| id | name |
+----+-------+
| 1 | Joe |
| 2 | Henry |
| 3 | Sam |
| 4 | Max |
+----+-------+
Orders table:
+----+------------+
| id | customerId |
+----+------------+
| 1 | 3 |
| 2 | 1 |
+----+------------+
<strong>Output:</strong>
+-----------+
| Customers |
+-----------+
| Henry |
| Max |
+-----------+
</pre>
Loading...
马建仓 AI 助手
尝试更多
代码解读
代码找茬
代码优化
1
https://gitee.com/tutuzhang0/leetcode-problemset.git
git@gitee.com:tutuzhang0/leetcode-problemset.git
tutuzhang0
leetcode-problemset
力扣题库(完整版)
master

搜索帮助