1243. Restore soft deleted — Marketplace — implementation variant 43

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

In a Marketplace application, implement this production problem: Restore a soft-deleted customer. The API/service receives user input and must return or modify data safely. Give the SQL solution, explain why it works, and show how the same operation is called from the selected stack.

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Answer & Explanation

4 Answers

Verified

Option A

SELECT * FROM the_table;

Additional Explanation

Incorrect: it does not implement the stated business rule and may modify/fetch the wrong rows.

Verified Correct Answer

Option B

UPDATE customers SET deleted_at=NULL,status='active' WHERE id=:customer_id AND deleted_at IS NOT NULL;

Additional Explanation

The predicate prevents changing already-active records unexpectedly.

Verified

Option C

DELETE FROM the_table;

Additional Explanation

Incorrect: it does not implement the stated business rule and may modify/fetch the wrong rows.

Verified

Option D

UPDATE the_table SET status='active';

Additional Explanation

Incorrect: it does not implement the stated business rule and may modify/fetch the wrong rows.