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 |
select `Name` as `Customers` from `Customers`
where `Id` not in
(select `CustomerId` from `Orders`);If you have a better solution, you can star and fork Leetcode-database-problem then create a pull request.