CREATE TABLE Person (name VARCHAR2, age NUMBER, city CLOB, gender CLOB, job CLOB)
CREATE TABLE PersonFriend (name VARCHAR2, friend VARCHAR2, year NUMBER)

How old is the average person for each job Show bar chart, list X-axis in descending order.
SELECT job, AVG(age) FROM Person GROUP BY job ORDER BY job DESC
SELECT "job", AVG("age") FROM "Person" GROUP BY "job" ORDER BY "job" DESC