CREATE TABLE gas_station (manager_name VARCHAR2, open_year NUMBER)

Show the manager name with most number of gas stations opened after 2000.
SELECT manager_name FROM gas_station WHERE open_year > 2000 GROUP BY manager_name ORDER BY COUNT(*) DESC LIMIT 1
SELECT "manager_name" FROM "gas_station" WHERE "open_year" > 2000 GROUP BY "manager_name" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY