SELECT rank FROM captain EXCEPT SELECT rank FROM captain WHERE CLASS  =  'Third-rate ship of the line'
What are the ranks of captains that have no captain that are in the Third-rate ship of the line class?
SELECT rank FROM captain EXCEPT SELECT rank FROM captain WHERE CLASS = 'Third-rate ship of the line '
select rank from captain except select rank from captain where class = value
What are the ranks of captains that have no captain that are in the Third-rate ship of the line class ?