SQL and dbms Join Concepts | Dataford Interview Questions

Explain how SQL and DBMS concepts show up in your day-to-day SQL and programming work.

Use the supplied relational data to demonstrate this with a query that calculates customer activity for the first quarter of 2025.

Output

One row per customer, including customers with no qualifying orders.
Columns: customer_id, customer_name, segment, order_count, total_revenue, revenue_rank, and activity_status.
Rank customers by total revenue descending, use customer ID as the tie-breaker, and return rows in rank order.

customers

Column	Type	Description
customer_idPK	INT	Unique customer identifier
customer_name	VARCHAR(100)	Customer display name
segment	VARCHAR(30)	Customer segmentation label

orders

Column	Type	Description
order_idPK	INT	Unique order identifier
customer_id	INT	Customer associated with the order
order_date	DATE	Date the order was placed
amount	NUMERIC(10,2)	Order revenue amount

Your question is SQL and dbms Join Concepts. Start with the requirements and the two tables in the Question tab.

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