CREATE TABLE ship (ship_id NUMBER, name CLOB, type CLOB, nationality CLOB, tonnage NUMBER)
CREATE TABLE mission (mission_id NUMBER, ship_id NUMBER, code CLOB, launched_year NUMBER, location CLOB, speed_knots NUMBER, fate CLOB)

Show different types of ships and the number of ships of each type.
SELECT type, COUNT(*) FROM ship GROUP BY type
SELECT "type", COUNT(*) FROM "ship" GROUP BY "type"