SELECT title FROM course WHERE dept_name  =  'Statistics' EXCEPT SELECT title FROM course WHERE dept_name  =  'Psychology'
What are the titles of courses that are in the Statistics department but not the Psychology department?
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
What are the titles of courses that are in the Statistics department but not the Psychology department ?