CREATE TABLE publication (publication_id NUMBER, book_id NUMBER, publisher CLOB, publication_date CLOB, price NUMBER)
CREATE TABLE book (book_id NUMBER, title CLOB, issues NUMBER, writer CLOB)

What are the distinct publishers of publications with price higher than 5000000?
SELECT DISTINCT publisher FROM publication WHERE price > 5000000
SELECT DISTINCT "publisher" FROM "publication" WHERE "price" > 5000000