原文:[LeetCode] Customers Who Never Order 从未下单订购的顾客

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. Table: Orders. Using the abov ...

2016-04-07 06:41 1 2108 推荐指数:

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leetcode-数据库】从不订购的客户

假设一个网站包含两个表,Customers 表和 Orders 表。编写一个SQL语句找出所有从不订购任何东西的客户。 表名: Customers。 Table: Orders. 以上述表格为例,返回以下内容: 这道题让我们给了我们一个Customers表 ...

Wed Feb 28 02:46:00 CST 2018 0 1088
下单

业务分析 点击提交订单的时候,会立即创建订单数据,创建订单数据会将数据存入到2张表中,分别是订单表和订单明细表,此处还需要修改商品对应的库存数量。 订单表结构如下: 订单明细表结构如下: 下单实现 下单的时候,先往tb_order表中增加数据,再往 ...

Wed Aug 11 21:46:00 CST 2021 0 281
LeetCode Binary Tree Level Order Traversal

Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example:Given binary tree ...

Sun Oct 28 06:04:00 CST 2012 2 4729
[leetcode]Binary Tree Level Order Traversal @ Python

原题地址:http://oj.leetcode.com/problems/binary-tree-level-order-traversal/ 题意:二叉树的层序遍历的实现。 解题思路:二叉树的层序遍历可以用bfs或者dfs来实现。这里使用的dfs实现,代码比较简洁。实际上,二叉树的先序遍历 ...

Mon May 12 01:55:00 CST 2014 0 4584
Binary Tree Level Order Traversal leetcode java

题目: Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given ...

Tue Aug 05 11:01:00 CST 2014 0 3205
who -b

~]# who -b 系统引导 2020-05-03 19:57[root@localhost ~]# who -r 运行级别 5 2020-05-03 19:58 ...

Wed May 06 08:21:00 CST 2020 0 561
 
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