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

Visualize a bar chart for what is average age for different job title?, I want to rank by the bars from low to high.
SELECT job, AVG(age) FROM Person GROUP BY job ORDER BY job
SELECT "job", AVG("age") FROM "Person" GROUP BY "job" ORDER BY "job"