CREATE TABLE ship (ship_id DECIMAL, name TEXT, type TEXT, built_year DECIMAL, class TEXT, flag TEXT)
CREATE TABLE captain (captain_id DECIMAL, name TEXT, ship_id DECIMAL, age TEXT, class TEXT, rank TEXT)

What are the names of captains, sorted by age descending?
SELECT name FROM captain ORDER BY age DESC
SELECT "name" FROM "captain" ORDER BY "age" DESC NULLS LAST