架构
Movie(title, year, director, budget, earnings)
Actor(stagename, realname, birthyear)
ActedIn(stagename, title, year, pay)
CanWorkWith(stagename, director)
寻找不止一次使用的电影片头(SQL Robot DEATH MACHINE 2001,2002,2039)
SELECT M.title
FROM Movie A
LEFT JOIN Movie M ON M.title = A.title AND A.year <> A.year
WHERE M.title IS NULL
因此,当它找到另一个已在不同年份使用的标题时,它将显示电影的标题
答案 0 :(得分:1)
SELECT
title
FROM
Movie
GROUP BY
title
HAVING
COUNT(*) > 1
答案 1 :(得分:1)
假设SQL 2008r2并且电影基于Title,Year,Director是唯一的:
;with cte as (
Select *, count(*) over(partition by Title) dups
From movie
)
Select *
From cte
Where dups> 1
返回已使用多次的所有电影标题。如果您想将它限制在同一年具有相同标题的电影中,只需将其添加到分区。
答案 2 :(得分:0)
Select M.Title
From Movie As M
Where Exists (
Select 1
From Movie As M1
Where M1.Title = M.Title
And M1.Year <> M.Year
)