Find Inactive Customers | Dataford Interview Questions

Your question is Find Inactive Customers. Start with the requirements and the two tables on the right.

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Problem

Flipkart wants to identify customers who may need re-engagement because they have not placed an order recently. Using the customer and order data, evaluate activity as of 2025-08-31.

Write a PostgreSQL query to find customers who placed no order during the six-month period from 2025-02-28 through 2025-08-31, inclusive.

Requirements

Return every customer with zero qualifying orders, including customers who have never ordered.
Return customer_id, customer_name, and the number of orders in the period as recent_order_count.
Exclude orders before the six-month window and orders after the as-of date.
Sort the output by customer_id in ascending order.

Schema

customers

Column	Type	Description
customer_idPK	INTEGER	Unique Flipkart customer identifier
customer_name	VARCHAR(100)	Customer's display name

orders

Column	Type	Description
order_idPK	INTEGER	Unique order identifier
customer_id	INTEGER	Customer who placed the order
order_date	DATE	Date on which the order was placed