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 the proportion of the total number of every ship type.
SELECT Type, COUNT(Type) FROM ship GROUP BY Type
SELECT "Type", COUNT("Type") FROM "ship" GROUP BY "Type"