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

Show me a stacked bar graph, the x-axis is the nationality of ship, and the y-axis is their total number of different nationality and split by ship type, and show X-axis in desc order.
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 NULLS LAST