Database: products_gen_characteristics
Question: What are the different product names for products that have the 'warm' characteristic:?
SQL:
SELECT DISTINCT t1.product_name FROM products AS t1 JOIN product_characteristics AS t2 ON t1.product_id  =  t2.product_id JOIN CHARACTERISTICS AS t3 ON t2.characteristic_id  =  t3.characteristic_id WHERE t3.characteristic_name  =  "warm"