CREATE TABLE person (name CLOB, age NUMBER, city CLOB, gender CLOB, job CLOB)
CREATE TABLE personfriend (name CLOB, friend CLOB, year NUMBER)

Who is the youngest male?
SELECT name FROM person WHERE gender = 'male' AND age = (SELECT MIN(age) FROM person WHERE gender = 'male')
SELECT "name" FROM "person" WHERE "age" = (SELECT MIN("age") FROM "person" WHERE "gender" = 'male') AND "gender" = 'male'