2388. SaaS: Find subscriptions expiring within seven days. — Python + FastAPI + SQLAlchemy

DBMS Published 30 Sept 2026 Updated 30 Sept 2026 0 Views Verified

In a saas module, solve this as a production problem using Python + FastAPI + SQLAlchemy: Find subscriptions expiring within seven days. Provide the SQL, explain the logic, show safe application integration, and mention failure/edge cases.

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Answer & Explanation

4 Answers

Verified Correct Answer

Option A

SELECT id,user_id,plan_id,end_date FROM subscriptions WHERE status='active' AND end_date>=CURRENT_DATE AND end_date

Additional Explanation

The half-open upper boundary avoids double counting the next day.

Verified

Option B

DELETE FROM table_name;

Additional Explanation

Incorrect: it does not satisfy the stated business rule and can return/change unintended data.

Verified

Option C

UPDATE table_name SET status='active';

Additional Explanation

Incorrect: it does not satisfy the stated business rule and can return/change unintended data.

Verified

Option D

SELECT * FROM table_name;

Additional Explanation

Incorrect: it does not satisfy the stated business rule and can return/change unintended data.