SELECT title FROM course WHERE dept_name  =  'Statistics' EXCEPT SELECT title FROM course WHERE dept_name  =  'Psychology'
Find the title of course that is provided by Statistics but not Psychology departments.
SELECT title FROM course WHERE dept_name = 'Statistics ' EXCEPT SELECT title FROM course WHERE dept_name = 'Psychology '
select title from course where dept_name = value except select title from course where dept_name = value
Find the title of course that is provided by Statistics but not Psychology departments .