CREATE TABLE Person (name VARCHAR, age INT, city TEXT, gender TEXT, job TEXT)
CREATE TABLE PersonFriend (name VARCHAR, friend VARCHAR, year INT)

What is minimum age for different job title, show in descending by the total number.
SELECT job, MIN(age) FROM Person GROUP BY job ORDER BY MIN(age) DESC
SELECT "job", MIN("age") FROM "Person" GROUP BY "job" ORDER BY MIN("age") DESC NULLS LAST