Question: find the name of driver who is driving the school bus with the longest working history.
Schema: create table school_bus (driver_id varchar, PRIMARY KEY (driver_id)); create table driver (name varchar, driver_id varchar, PRIMARY KEY (name))
SQL: select t1.name from driver as t1 join school_bus as t2 on t1.driver_id = t2.driver_id order by years_working desc limit 1