Context: CREATE TABLE wedding (name VARCHAR, age VARCHAR, is_male VARCHAR, people_id VARCHAR, male_id VARCHAR); CREATE TABLE people (name VARCHAR, age VARCHAR, is_male VARCHAR, people_id VARCHAR, male_id VARCHAR)
Question: Show the name and age for all male people who don't have a wedding.
Answer: SELECT name, age FROM people WHERE is_male = 'T' AND NOT people_id IN (SELECT male_id FROM wedding)