SELECT Actor.ActNo, Actor.ActName, Max(Screen.Ticketoffice) AS 最高票房, Min(Screen.Ticketoffice) AS 最低票房, Avg(Screen.Ticketoffice) AS 平均票房
FROM Actor, Movie, Screen
WHERE Actor.ActNo=Screen.ActNo AND Movie.MovNo=Screen.MovNo
GROUP BY Actor.ActNo, Actor.ActName;