CREATE TABLE publication (Publisher VARCHAR2, Price NUMBER)

Show the publishers that have publications with price higher than 10000000 and publications with price lower than 5000000.
SELECT Publisher FROM publication WHERE Price > 10000000 INTERSECT SELECT Publisher FROM publication WHERE Price < 5000000
SELECT "Publisher" FROM "publication" WHERE "Price" > 10000000 INTERSECT SELECT "Publisher" FROM "publication" WHERE "Price" < 5000000