CREATE TABLE dorm (dormid DECIMAL, dorm_name TEXT, student_capacity DECIMAL, gender TEXT)
CREATE TABLE student (stuid DECIMAL, lname TEXT, fname TEXT, age DECIMAL, sex TEXT, major DECIMAL, advisor DECIMAL, city_code TEXT)
CREATE TABLE lives_in (stuid DECIMAL, dormid DECIMAL, room_number DECIMAL)
CREATE TABLE has_amenity (dormid DECIMAL, amenid DECIMAL)
CREATE TABLE dorm_amenity (amenid DECIMAL, amenity_name TEXT)

List the first and last name of students who are not living in the city with code HKG, and sorted the results by their ages.
SELECT fname, lname FROM student WHERE city_code <> 'HKG' ORDER BY age
SELECT "fname", "lname" FROM "student" WHERE "city_code" <> 'HKG' ORDER BY "age" NULLS FIRST