Table: reviews

+-------------+---------+
| Column Name | Type    |
+-------------+---------+
| review_id   | integer |
| user_id     | integer |
| submit_date | date    |
| product_id  | integer |
| stars       | integer |
+-------------+---------+

review_id is the primary key. Each row represents a product review with a star rating between 1 and 5.