Database: real_estate_rentals
Question: What is the description of the most common property type? List the description and code.
SQL:
SELECT T1.property_type_description ,  T1.property_type_code FROM Ref_Property_Types AS T1 JOIN Properties AS T2 ON T1.property_type_code  =  T2.property_type_code GROUP BY T1.property_type_code ORDER BY count(*) DESC LIMIT 1;