CREATE TABLE school_bus (school_id NUMBER, driver_id NUMBER, years_working NUMBER, if_full_time others)
CREATE TABLE driver (driver_id NUMBER, name CLOB, party CLOB, home_city CLOB, age NUMBER)
CREATE TABLE school (school_id NUMBER, grade CLOB, school CLOB, location CLOB, type CLOB)

Show all different home cities.
SELECT DISTINCT home_city FROM driver
SELECT DISTINCT "home_city" FROM "driver"