Solution beat 98% with basic JOIN, and SUM()
Code\n\n-- Write your PostgreSQL query statement below\nSELECT product_name, unit \nFROM (\n    SELECT P.product_name, SUM(O.unit) as unit\n    FROM Products as
# Code\n```\n-- Write your PostgreSQL query statement below\nSELECT product_name, unit \nFROM (\n    SELECT P.product_name, SUM(O.unit) as unit\n    FROM Products as P \n    JOIN Orders as O\n    ON P.product_id = O.product_id\n    WHERE O.order_date >= DATE \'2020-02-01\' AND O.order_date <= DATE \'2020-02-29\'\n    GROUP BY P.product_id, P.product_name\n)\nWHERE unit >= 100;\n\n```
['PostgreSQL']