Table schema:
CREATE TABLE Order_Items (product_id VARCHAR, total_amount_purchased INTEGER); CREATE TABLE Product_Suppliers (product_id VARCHAR, total_amount_purchased INTEGER)

Question: Return the ids of all products that were ordered more than three times or supplied more than 80000.
SQL: SELECT product_id FROM Order_Items GROUP BY product_id HAVING COUNT(*) > 3 UNION SELECT product_id FROM Product_Suppliers GROUP BY product_id HAVING SUM(total_amount_purchased) > 80000