CREATE TABLE church (church_id DECIMAL, name TEXT, organized_by TEXT, open_date DECIMAL, continuation_of TEXT)
CREATE TABLE people (people_id DECIMAL, name TEXT, country TEXT, is_male TEXT, age DECIMAL)
CREATE TABLE wedding (church_id DECIMAL, male_id DECIMAL, female_id DECIMAL, year DECIMAL)

Show the minimum, maximum, and average age for all people.
SELECT MIN(age), MAX(age), AVG(age) FROM people
SELECT MIN("age"), MAX("age"), AVG("age") FROM "people"