SQL Query Code Test and Bug Fix | Dataford Interview Questions

Tell me about a time you worked on a SQL query code test and then fixed a bug in the solution.

For the SQL portion, use the provided customers and payments tables. Write the corrected query that returns settled payment totals for active customers, including customers with no settled payments.

Output

One row per active customer, with customer_name and total_settled_amount.
Include customers with no settled payments as zero.
Sort by total descending, then customer name 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 is active

payments

Column	Type	Description
payment_idPK	INT	Unique payment identifier
customer_id	INT	Customer associated with the payment
amount	NUMERIC(12,2)	Payment amount
status	VARCHAR(40)	Payment processing status

Your question is SQL Query Code Test and Bug Fix. Start with the requirements and the two tables in the Question tab.

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Problem