LeeCode(Database)-Customers Who Never Order
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 |
+-----------+
# Write your MySQL query statement below
SELECT Customers.Name as Customers FROM Customers where Customers.Id not in (select Orders.CustomerId from Orders)
LeeCode(Database)-Customers Who Never Order的更多相关文章
- DataBase -- Customers Who Never Order
Question: Suppose that a website contains two tables, the Customers table and the Orders table. Writ ...
- [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 qu ...
- [SQL]LeetCode183. 从不订购的客户 | Customers Who Never Order
Suppose that a website contains two tables, the Customers table and the Orders table. Write a SQL qu ...
- 【SQL】183. Customers Who Never Order
Suppose that a website contains two tables, the Customers table and the Orders table. Write a SQL qu ...
- LeetCode - Customers Who Never Order
Description: Suppose that a website contains two tables, the Customers table and the Orders table. W ...
- 183. Customers Who Never Order
Suppose that a website contains two tables, the Customers table and the Orders table. Write a SQL qu ...
- Customers Who Never Order
Suppose that a website contains two tables, the Customers table and the Orders table. Write a SQL qu ...
- LeetCode——Customers Who Never Order(灵活使用NOT IN以及IN)
Suppose that a website contains two tables, the Customers table and the Orders table. Write a SQL qu ...
- 分别针对Customers表与Order表的通用查询操作
1.针对customers表通用的查询操作 CustomerForQuery package com.aff.PreparedStatement; import java.lang.reflect.F ...
随机推荐
- C++中初始化和定义对象的语法,带括号与不带括号的区别
小记:运行环境:win xp vs2008 #include <iostream>#include <string> using std::cout;using std::c ...
- HDU 1394 Minimum Inversion Number(线段树 或 树状数组)
题目大意:给出从 0 到 n-1 的整数序列,A0,A1,A2...An-1.可将该序列的前m( 0 <= m < n )个数移到后面去,组成其他的序列,例如当 m=2 时,得到序列 A2 ...
- shell编程while
脚本编程: 顺序结构 选择结构 if case 循环结构 for while until whil ...
- Eclipse 里的 Classpath Variables M2_REPO 无法修改(maven)
解决方法: 在C:\Documents and Settings\Administrator\.m2中放入setting.xml,并修改本地仓库为 <localRepository>D ...
- Android UI布局之FrameLayout
一个FrameLayout对象就好比一块屏幕上提前预定好的空白区域.然后能够填充一些元素到里边.例如说一张图片等.须要注意的是,全部的元素都被放置在FrameLayout区域最左边上的区域.并且无法为 ...
- C#中静态类、静态方法和静态变量的简单说明
静态方法与静态变量一样,属于类本身,而不属于哪个类的一个对象.调用一个被定义为static的方法,只有通过在它前面加上这个类的名称.一般定义里说是可以通过实例调用的.其他语言我还没测试,但是在C#中是 ...
- Git(Repo)常用命令收集
(注意: 只记录工作中实际使用的命令) 同步android源码 repo sync:(可加-c,只取当前分支: 可加-j4,线程数量) 查看android源码下所有项目的git状态 rep ...
- Asp.net数据库缓存依赖
Asp.net数据库缓存依赖 更多的时候,我们的服务器性能损耗还是在查询数据库的时候,所以对数据库的缓存还是显得特别重要,上面几种方式都可以实现部分数据缓存功能.但问题是我们的数据有时候是在变化的,这 ...
- scrollview不能滚动
1. 图片视图上不能直接滚动,需要设置交互属性为YES _contentView = [[UIImageView alloc]initWithFrame:CGRectMake(0, _headerVi ...
- ie下没有背景色bug的解决方法
鼠标经过下面的二级菜单的时候,在ie下面,收缩上去了,给这个二级菜单加了背景后,就是正常的,这个是ie下面的一个bug,解决方法:background-img:url(123.jpg):url里面的图 ...