CREATE TABLE gymnast (gymnast_id DECIMAL, floor_exercise_points DECIMAL, pommel_horse_points DECIMAL, rings_points DECIMAL, vault_points DECIMAL, parallel_bars_points DECIMAL, horizontal_bar_points DECIMAL, total_points DECIMAL)
CREATE TABLE people (people_id DECIMAL, name TEXT, age DECIMAL, height DECIMAL, hometown TEXT)

Return the age of the person with the greatest height.
SELECT age FROM people ORDER BY height DESC LIMIT 1
SELECT "age" FROM "people" ORDER BY "height" DESC NULLS LAST LIMIT 1