Customers without orders
mediumCustomers without orders
Amazon SQL Interview Question
Amazon's marketing team wants to send a welcome offer to people who created an account but never bought anything.
Identify every customer who has never placed an order, showing their customer_id and name. An order of any status counts as an order.
Asked of
- Data Analyst
- Business Analyst
- BI Analyst
- Analytics Engineer
- Data Engineer
- AI Engineer
customersTable10 rows
| Column Name | Type |
|---|---|
| customer_id | BIGINT |
| name | VARCHAR |
| country | VARCHAR |
| segment | VARCHAR |
| signup_date | DATE |
ordersTable35 rows
| Column Name | Type |
|---|---|
| order_id | BIGINT |
| customer_id | BIGINT |
| order_date | DATE |
| status | VARCHAR |
| amount | DOUBLE |
customersExample Input
| customer_id | name | country | segment | signup_date |
|---|---|---|---|---|
| 1 | Priya Sharma | India | consumer | 2023-01-14 |
| 2 | Marcus Webb | United States | enterprise | 2023-02-03 |
| 3 | Ana Sousa | Brazil | consumer | 2023-02-27 |
| 4 | Liam O'Connor | Ireland | small_business | 2023-03-15 |
| 5 | Yuki Tanaka | Japan | enterprise | 2023-04-02 |
| 6 | Fatima Al-Rashid | United Arab Emirates | consumer | 2023-05-21 |
| 7 | Daniel Okafor | Nigeria | small_business | 2023-06-08 |
ordersExample Input
| order_id | customer_id | order_date | status | amount |
|---|---|---|---|---|
| 1001 | 1 | 2024-01-05 | completed | 120.5 |
| 1002 | 2 | 2024-01-07 | completed | 2400 |
| 1003 | 1 | 2024-01-11 | completed | 89.99 |
| 1004 | 3 | 2024-01-15 | canceled | 45 |
| 1005 | 4 | 2024-01-18 | completed | 610.75 |
| 1006 | 2 | 2024-01-22 | completed | 1850.25 |
| 1007 | 5 | 2024-01-29 | completed | 3200 |
| 1008 | 1 | 2024-02-02 | refunded | 75 |
| 1009 | 6 | 2024-02-06 | completed | 55.4 |
| 1010 | 3 | 2024-02-09 | completed | 132.6 |
Example Output
| customer_id | name |
|---|---|
| 7 | Daniel Okafor |
Explanation
Customers 1 to 6 each placed at least one order in the example. Daniel Okafor, customer 7, has no orders at all, so that is the only customer returned.
The example above is a small slice of the data. Your query runs against the full tables.
Company
Amazon
Difficulty
medium
Topic
joins
Your query
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