Question

我本来打算使用隐式联接来获得安吉丽娜·朱莉（Angelina Jolie）作为导演的所有电影，或者她是这部影片的主角

SELECT DISTINCT title, relYear
FROM actor,movie 
WHERE director ='Angelina Jolie' OR aID in (SELECT aID 
                                            FROM actor
                                             WHERE fName='Angelina' and surname='Jolie'

以下是相关表格

movie(id, title, relYear, category, runTime, director,
studioName, description, rating)
actor(aID, fName, surname, gender)
stars(movieID, actorID)
movGenre(movieID, genre)

这会返回所有电影，我认为是因为aID in (SELECT aID

我不知道如何在不对三个表使用显式联接的情况下执行此操作，即使子查询也是最有效的方法？谢谢

Answer 1

这就是我要在MSSQL上执行的操作。认为它应该可以在MySql上工作。

Select title, relYear FROM movie WHERE director = 'Angelina Jolie' OR id IN 
(SELECT movieId FROM stars inner join actor ON stars.actorId = actor.aID WHERE
 actor.fName = 'Angelina' AND surname = 'Jolie')

MySQL隐式联接+子查询

1 个答案: