ALTER TABLE ksiazki
ADD COLUMN obraz_url VARCHAR(255);

INSERT INTO ksiazki (tytul, autor, cena, obraz_url) VALUES
('Descent of Angels', 'Mitchel Scanlon', 49.99, 'descent-of-angels.jpg'),
('Horus Rising', 'Dan Abnett', 49.99, 'horus-rising.jpg'),
('False Gods', 'Graham McNeill', 49.99, 'false-gods.jpg'),
('Galaxy in Flames', 'Ben Counter', 49.99, 'galaxy-in-flames.jpg'),
('Fulgrim', 'Graham McNeill', 49.99, 'fulgrim.jpg'),
('Flight of the Eisenstein', 'James Swallow', 49.99, 'flight-of-the-eisenstein.jpg'),
('Echoes of Eternity', 'Aaron Dembski-Bowden', 59.99, 'echoes-of-eternity.jpg'),
('First and Only', 'Dan Abnett', 49.99, 'first-and-only.jpg'),
('The Devastation of Baal', 'Guy Haley', 59.99, 'devastation-of-baal.jpg'),
('Fabius Bile: Primogenitor', 'Joshua Reynolds', 39.99, 'fabius-bile-primogenitor.jpg'),
('Fabius Bile: Clonelord', 'Joshua Reynolds', 39.99, 'fabius-bile-clonelord.jpg'),
('Fabius Bile: Manflayer', 'Joshua Reynolds', 39.99, 'fabius-bile-manflayer.jpg'),
('Ahriman: Exile', 'John French', 39.99, 'ahriman-exile.jpg'),
('Ahriman: Sorcerer', 'John French', 39.99, 'ahriman-sorcerer.jpg'),
('Ahriman: Unchanged', 'John French', 39.99, 'ahriman-unchanged.jpg'),
('Mephiston: Blood of Sanguinius', 'Darius Hinks', 39.99, 'mephiston-blood-of-sanguinius.jpg'),
('Mephiston: Revenant Crusade', 'Darius Hinks', 39.99, 'mephiston-revenant-crusade.jpg'),
('Mephiston: City of Light', 'Darius Hinks', 39.99, 'mephiston-city-of-light.jpg');