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

Show the home city with the most number of drivers.
SELECT home_city FROM driver GROUP BY home_city ORDER BY COUNT(*) DESC LIMIT 1
SELECT "home_city" FROM "driver" GROUP BY "home_city" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1