SQL Scripting on the Job | Dataford Interview Questions

How much experience do you have writing SQL scripts on the job?

To demonstrate, write a PostgreSQL query using customers and orders that summarizes qualifying orders placed during 2025. Include customers with no qualifying orders.

Output

One row per customer with customer_name, completed_order_count, total_completed_amount, and order_category.
Include only orders with status COMPLETED and a 2025 order date.
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

orders

Column	Type	Description
order_idPK	INT	Unique order identifier
customer_id	INT	Customer associated with the order
order_status	VARCHAR(20)	Order processing status
order_date	DATE	Date the order was placed
order_amount	NUMERIC(10,2)	Order amount

Your question is SQL Scripting on the Job. Start with the requirements and the two tables in the Question tab.

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Problem