utery_variantaA_2

SELECT uID, jmeno,
(
    SELECT COUNT(*)
    FROM
    (
        SELECT TOP 1 oID
        FROM objednavka ob
        WHERE ob.uID = o.uID
        ORDER BY ob.vytvorena DESC
    ) ob
    JOIN polozka p ON ob.oID = p.oID
) pocetPolozek
FROM osoba o


SELECT o.uID, o.jmeno, COUNT(*) pocetPolozek
FROM osoba o
JOIN objednavka ob ON o.uID = ob.uID
JOIN polozka p ON ob.oID = p.oID
WHERE ob.vytvorena >= ALL
(
    SELECT vytvorena
    FROM objednavka ob2
    WHERE ob2.uID = o.uID
)
GROUP BY o.uID, o.jmeno