CREATE TABLE books (
  isbn    char(14) NOT NULL,
  title   varchar(255),
  author  varchar(255),
  price   decimal(5,2)
);

INSERT INTO books (isbn, title, author, price) VALUES
('978-1503261969', 'Emma', 'Jayne Austen', 9.44),
('978-1514274873', 'Journal of a Soldier', NULL, 5.49),
('978-1503379640', 'The Prince', 'Niccolò Machiavelli', NULL);