kw1; SELECT id, imie, nazwisko FROM personel' WHERE STATUS = "policjant";

kw2; SELECT typ, COUNT(*) FROM pojazdy GROUP BY typ;

kw3; SELECT id, nazwisko FROM personel WHERE id NOT in ( SELECT id_personel FROM rejestr );

kw4; INSERT INTO rejestr(`data`, id_personel, id_pojazd) VALUES (CURRENT_DATE, 1, 14);