SQL problem - List the Products Ordered in a Period

Problem

Query

SELECT
    p.product_name,
    SUM(o.unit) as unit
FROM
    Products p,
    Orders o
WHERE
    p.product_id = o.product_id
    AND YEAR(o.order_date) = 2020
    AND MONTH(o.order_date) = 2
GROUP BY
    product_name
HAVING
    SUM(o.unit) >= 100