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 |
+-----------+
- mysql
/*
Success Detail:
Runtime: 253 ms, faster than 87.43% of MySQL online submissions for Customers Who Never Order.
Memory Usage: 0 MB, less than 100% of MySQL online submissions for Customers Who Never Order.
*/
select Name as Customers
from Customers
where id not in(select CustomerId from Orders)