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)

Stacked bar chart of how many nationality for with each Type in each nationality, and could you show by the names in desc?
SELECT Nationality, COUNT(Nationality) FROM ship GROUP BY Type, Nationality ORDER BY Nationality DESC
SELECT "Nationality", COUNT("Nationality") FROM "ship" GROUP BY "Type", "Nationality" ORDER BY "Nationality" DESC