CREATE TABLE student (fname VARCHAR, city_code VARCHAR, age VARCHAR)

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'