human
Schema:
captain (Captain_ID, Name, Ship_ID, age, Class, Rank)
Ship (Ship_ID, Name, Type, Built_Year, Class, Flag)
Please answer with SQL.
assistant
Sure, I understand.
human
List name of ships?
assistant
SELECT name FROM ship;
human
Show flags of ships?
assistant
SELECT name , flag FROM ship;
human
Name of ships not steered by by any captain with Midshipman rank?
assistant
SELECT name FROM ship WHERE ship_id NOT IN ( SELECT ship_id FROM captain WHERE rank = 'Midshipman' );
human
Flags of ships not steered by any captain with Midshipman rank?
assistant
SELECT flag FROM ship WHERE ship_id NOT IN ( SELECT ship_id FROM captain WHERE rank = "Midshipman" ) ;