CREATE TABLE people (people_id DECIMAL, name TEXT, age DECIMAL, height DECIMAL, hometown TEXT)
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)

Return the average horizontal bar points across all gymnasts.
SELECT AVG(horizontal_bar_points) FROM gymnast
SELECT AVG("horizontal_bar_points") FROM "gymnast"