Database: book_1
Question: What are the order ids for orders that include both Pride and Prejudice and The Little Prince?
SQL:
SELECT idOrder FROM Book AS T1 JOIN Books_Order AS T2 ON T1.isbn  =  T2.isbn WHERE T1.title  =  "Pride and Prejudice" INTERSECT SELECT idOrder FROM Book AS T1 JOIN Books_Order AS T2 ON T1.isbn  =  T2.isbn WHERE T1.title  =  "The Little Prince"