3363. Reporting: Build a daily sales report with order count, customer count and revenue. — Security

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

In a reporting module, solve this as a production problem using Security: Build a daily sales report with order count, customer count and revenue. Provide the SQL, explain the logic, show safe application integration, and mention failure/edge cases.

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Answer & Explanation

4 Answers

Verified

Option A

SELECT * FROM table_name;

Additional Explanation

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

Verified

Option B

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 C

DELETE FROM table_name;

Additional Explanation

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

Verified Correct Answer

Option D

SELECT DATE(order_date) day,COUNT(*) order_count,COUNT(DISTINCT customer_id) customer_count,SUM(total_amount) revenue FROM orders WHERE status='completed' GROUP BY DATE(order_date) ORDER BY day;

Additional Explanation

Multiple aggregates can be calculated in one grouped scan.