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 the comparison of the total number of all ships' nationalities with a bar graph, and I want to sort in desc by the x axis.
SELECT Nationality, COUNT(Nationality) FROM ship GROUP BY Nationality ORDER BY Nationality DESC
SELECT "Nationality", COUNT("Nationality") FROM "ship" GROUP BY "Nationality" ORDER BY "Nationality" DESC NULLS LAST