CREATE TABLE news_report (journalist_ID NUMBER, Event_ID NUMBER, Work_Type CLOB)
CREATE TABLE event (Event_ID NUMBER, Date CLOB, Venue CLOB, Name CLOB, Event_Attendance NUMBER)
CREATE TABLE journalist (journalist_ID NUMBER, Name CLOB, Nationality CLOB, Age CLOB, Years_working NUMBER)

Bar chart of sum age from each nationality, and I want to show by the total number of age in desc.
SELECT Nationality, SUM(Age) FROM journalist GROUP BY Nationality ORDER BY SUM(Age) DESC
SELECT "Nationality", SUM("Age") FROM "journalist" GROUP BY "Nationality" ORDER BY SUM("Age") DESC