CREATE TABLE journalist (journalist_ID NUMBER, Name CLOB, Nationality CLOB, Age CLOB, Years_working NUMBER)
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)

Bar graph to show the number of nationality from different nationality, and rank by the Y from high to low.
SELECT Nationality, COUNT(Nationality) FROM journalist GROUP BY Nationality ORDER BY COUNT(Nationality) DESC
SELECT "Nationality", COUNT("Nationality") FROM "journalist" GROUP BY "Nationality" ORDER BY COUNT("Nationality") DESC