CREATE TABLE people (people_id NUMBER, name CLOB, height NUMBER, weight NUMBER, birth_date CLOB, birth_place CLOB)
CREATE TABLE body_builder (body_builder_id NUMBER, people_id NUMBER, snatch NUMBER, clean_jerk NUMBER, total NUMBER)

What is the most common birth place of people?
SELECT birth_place FROM people GROUP BY birth_place ORDER BY COUNT(*) DESC LIMIT 1
SELECT "birth_place" FROM "people" GROUP BY "birth_place" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY