Table schema:
CREATE TABLE Properties (property_type_code VARCHAR); CREATE TABLE Ref_Property_Types (property_type_description VARCHAR, property_type_code VARCHAR)

Question: Show the property type descriptions of properties belonging to that code.
SQL: SELECT T2.property_type_description FROM Properties AS T1 JOIN Ref_Property_Types AS T2 ON T1.property_type_code = T2.property_type_code GROUP BY T1.property_type_code