data transformation logic and query optimization.

Thu Apr 09 2026 15:12:28 GMT+0000 (Coordinated Universal Time)

Saved by @yasvanthM

WITH RankedReviews AS (
    SELECT 
        p.product_name, 
        r.review_text, 
        r.submit_date,
        ROW_NUMBER() OVER (PARTITION BY p.product_id ORDER BY r.submit_date DESC) as rnk
    FROM reviews r
    JOIN products p ON r.product_id = p.product_id
)
SELECT product_name, review_text, submit_date
FROM RankedReviews
WHERE rnk = 1;

1. SQL: Top-N for Multiple Groups Senior roles often require finding the highest-ranked record within each category using window functions like ROW_NUMBER() or RANK(). Problem Statement: Find the most recent review for every product. Return the product name, review text, and the date it was submitted.