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

Find the first name of students living in city PHL whose age is between 20 and 25.
SELECT fname FROM student WHERE city_code = 'PHL' AND age BETWEEN 20 AND 25
SELECT "fname" FROM "student" WHERE "age" <= 25 AND "age" >= 20 AND "city_code" = 'PHL'