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【SQL】183. 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…

183. 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…

leetcode 183. Customers Who Never Order

select Name as Customers from Customers where Id not in (select CustomerId from Orders);…

LeetCode 183. Customers Who Never Order (从不订购的客户)

题目标签: 题目给了我们 Customers 和 Orders 两个表格,让我们找到 从没订购过的客户. 首先从Orders 得到 订购过的CustomerId,然后再去Customers 里找 没有出现过的 Id,返回名字. Java Solution: Runtime:  264 ms, faster than 53 % Memory Usage: N/A 完成日期:06/01/2019 关键点:NOT IN # Write your MySQL query statement below…

[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. +----+-------+ | Id | Name | +----+-------+ | 1 | Joe | | 2 | Henry | | 3 | Sam…

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…

[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 query to find all customers who never order anything. Table: Customers. +----+-------+ | Id | Name | +----+-------+ | 1 | Joe | | 2 | Henry | | 3 | Sam…

[LeetCode] 183. Customers Who Never Order_Easy tag: SQL

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…

LeetCode - Customers Who Never Order

Description: 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 一种比较高效的方法是左连接,左连接之后任然使用被连接的两个表或多个表来定位连接之后的表的数据. # Write your MySQL query statement bel…

DataBase -- Customers Who Never Order

Question: 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 |…