Orders per customer segment
mediumOrders per customer segment
Amazon SQL Interview Question
Amazon sells to individual shoppers and, through Amazon Business, to small businesses and large enterprises. The sales team splits customers into these three segments and wants to know which segment places the most orders.
For each segment, count the orders placed by its customers as order_count. Count every order, whatever its status.
Asked of
- Data Analyst
- Business Analyst
- BI Analyst
- Product Analyst
ordersTable35 rows
| Column Name | Type |
|---|---|
| order_id | BIGINT |
| customer_id | BIGINT |
| order_date | DATE |
| status | VARCHAR |
| amount | DOUBLE |
customersTable10 rows
| Column Name | Type |
|---|---|
| customer_id | BIGINT |
| name | VARCHAR |
| country | VARCHAR |
| segment | VARCHAR |
| signup_date | DATE |
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 |
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 |
Example Output
| segment | order_count |
|---|---|
| consumer | 6 |
| enterprise | 3 |
| small_business | 1 |
Explanation
Three consumer customers placed orders in the example: Priya Sharma, Ana Sousa and Fatima Al-Rashid. Together they placed 6 orders, so the consumer segment's count is 6, not 3.
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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