Task: Text to Code
Input (English): SQL: SELECT characteristic_name , other_characteristic_details , characteristic_data_type FROM Characteristics EXCEPT SELECT characteristic_name , other_characteristic_details , characteristic_data_type FROM Characteristics
Feedback: Make sure to find product's characteristics which have never been used .
Output (English): SELECT characteristic_name ,  other_characteristic_details ,  characteristic_data_type FROM CHARACTERISTICS EXCEPT SELECT t1.characteristic_name ,  t1.other_characteristic_details ,  t1.characteristic_data_type FROM CHARACTERISTICS AS t1 JOIN product_characteristics AS t2 ON t1.characteristic_id  =  t2.characteristic_id