CREATE TABLE school_bus (driver_id VARCHAR2)
CREATE TABLE driver (name VARCHAR2, driver_id VARCHAR2)

find the name of driver who is driving the school bus with the longest working history.
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
SELECT "t1"."name" FROM "driver" "t1" JOIN "school_bus" "t2" ON "t1"."driver_id" = "t2"."driver_id" ORDER BY "years_working" DESC FETCH FIRST 1 ROWS ONLY