183.Customers Who Never Order

标签：table   custom   contains   mysq   website   stat   follow   pre   amp   

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 C.Name Customers
    FROM Customers C
    WHERE C.Id NOT IN (SELECT CustomerId FROM Orders);

183.Customers Who Never Order

标签：table   custom   contains   mysq   website   stat   follow   pre   amp   

原文地址：https://www.cnblogs.com/bernieloveslife/p/9771783.html