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

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 NULLS LAST