Database: book_press
Question: Which authors have never published under the "Accor" press? Give me their names.
SQL:
SELECT name FROM author EXCEPT SELECT t1.name FROM author AS t1 JOIN book AS t2 ON t1.author_id  =  t2.author_id JOIN press AS t3 ON t2.press_id  =  t3.press_id WHERE t3.name  =  'Accor'