2339. Soft delete: Exclude soft-deleted rows from all normal customer queries. — Python + FastAPI + SQLAlchemy

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

In a soft delete module, solve this as a production problem using Python + FastAPI + SQLAlchemy: Exclude soft-deleted rows from all normal customer queries. Provide the SQL, explain the logic, show safe application integration, and mention failure/edge cases.

Looking for the latest Sarkari Result 2026 updates? Check the latest government exam results, merit lists and result updates on Sarkari Resultess.

Answer & Explanation

4 Answers

Verified

Option A

DELETE FROM table_name;

Additional Explanation

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

Verified

Option B

SELECT * 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 Correct Answer

Option D

SELECT id,name,email FROM customers WHERE deleted_at IS NULL;

Additional Explanation

Centralize this predicate in ORM scopes/repositories to avoid accidental exposure.