Database: tracking_software_problems
Question: For each product that has problems, find the number of problems reported after 1986-11-13 and the product id?
SQL:
SELECT count(*) ,  T2.product_id FROM problems AS T1 JOIN product AS T2 ON T1.product_id = T2.product_id WHERE T1.date_problem_reported > "1986-11-13" GROUP BY T2.product_id