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

Show minimal age from each job, could you order x-axis from low to high order?
SELECT job, MIN(age) FROM Person GROUP BY job ORDER BY job
SELECT "job", MIN("age") FROM "Person" GROUP BY "job" ORDER BY "job" NULLS FIRST