kw1:
SELECT m.nazwa, m.ilosc, p.nazwaProd FROM materialy AS m JOIN producenci AS p ON m.Producenci_id = p.id WHERE m.ilosc > 9;

kw2:
SELECT m.nazwa, p.nazwaProd, j.nazwaJedn FROM Materialy AS m JOIN Producenci AS p ON m.Producenci_id = p.id JOIN Jednostki AS j ON m.Jednostki_id = j.id;

kw3:
CREATE USER 'zaopatrzenie'@'localhost' IDENTIFIED BY "Z@op@trzenie";

kw4:
GRANT SELECT, UPDATE, INSERT, DELETE ON firma.* TO 'zaopatrzenie'@'localhost';