CREATE TABLE ship (Ship_ID NUMBER, Name CLOB, Type CLOB, Nationality CLOB, Tonnage NUMBER)
CREATE TABLE mission (Mission_ID NUMBER, Ship_ID NUMBER, Code CLOB, Launched_Year NUMBER, Location CLOB, Speed_knots NUMBER, Fate CLOB)

Bar graph to show how many nationality from different nationality, and order Nationality in asc order.
SELECT Nationality, COUNT(Nationality) FROM ship GROUP BY Nationality ORDER BY Nationality
SELECT "Nationality", COUNT("Nationality") FROM "ship" GROUP BY "Nationality" ORDER BY "Nationality"