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

What is average age for different job title Visualize by bar chart, rank total number from high to low order.
SELECT job, AVG(age) FROM Person GROUP BY job ORDER BY AVG(age) DESC
SELECT "job", AVG("age") FROM "Person" GROUP BY "job" ORDER BY AVG("age") DESC