CREATE TABLE Ship (Ship_ID NUMBER, Name CLOB, Type CLOB, Built_Year FLOAT, Class CLOB, Flag CLOB)
CREATE TABLE captain (Captain_ID NUMBER, Name CLOB, Ship_ID NUMBER, age CLOB, Class CLOB, Rank CLOB)

Show the total number from each rank
SELECT Rank, COUNT(*) FROM captain GROUP BY Rank
SELECT "Rank", COUNT(*) FROM "captain" GROUP BY "Rank"