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)

What is the total number of ships with different nationalities and ship types?
SELECT Nationality, COUNT(Nationality) FROM ship GROUP BY Type, Nationality
SELECT "Nationality", COUNT("Nationality") FROM "ship" GROUP BY "Type", "Nationality"