Question: Find the id and color description of the products with at least 2 characteristics.
SQL: SELECT t1.product_id ,  t2.color_description FROM products AS t1 JOIN ref_colors AS t2 ON t1.color_code  =  t2.color_code JOIN product_characteristics AS t3 ON t1.product_id  =  t3.product_id GROUP BY t1.product_id HAVING count(*)  >=  2