SQL and Data Manipulation | Dataford Interview Questions

Tell me about your experience with SQL and data manipulation.

Demonstrate your answer with a query over the provided customer and order data. Return active customers who placed at least two completed orders during 2025, including their order totals and spending classification.

Output

One row per qualifying active customer with customer_id, customer_name, completed_order_count, total_completed_amount, latest_completed_order_date, and spending_tier.
Exclude cancelled orders, orders outside 2025, inactive customers, and customers with fewer than two qualifying orders.
Sort by total_completed_amount descending, then customer_id ascending.

Schema

customers

Column	Type	Description
customer_idPK	INT	Unique customer identifier
customer_name	VARCHAR(100)	Customer display name
is_active	BOOLEAN	Whether the customer account is active

orders

Column	Type	Description
order_idPK	INT	Unique order identifier
customer_id	INT	Customer who placed the order
order_date	DATE	Date the order was placed
status	VARCHAR(20)	Order processing status
amount	DECIMAL(10,2)	Order amount

Your question is SQL and Data Manipulation. Start with the requirements and the two tables in the Question tab.

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Problem