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

Give me a stacked bar chart for showing the total number of each ship type and categorize it by ship nationality.
SELECT Type, COUNT(Type) FROM ship GROUP BY Nationality, Type
SELECT "Type", COUNT("Type") FROM "ship" GROUP BY "Nationality", "Type"