MySQL Query to find titles of movies with actors that have their name starting with B

Question

I'm trying to write a MySQL Query which would find the titles of movies led by actors that have their names starting with B. I have got 2 tables, an Actor Table and Movie Table. In my Actor table, I've got the actID and actName, and in my Movie table, I've got the mvID, actID (FK), mvTitle, mvGenre, mvPrice, mvYear. I have already written a query for a similiar problem and I have tried to modify it for this query but it isn't exactly working. What I have so far is:

SELECT mvTitle
FROM Movie
WHERE EXISTS (SELECT mvGenre
              FROM Movie,
                   Actor
              WHERE (Actor.actID = Movie.actID)
                and (Actor.actName LIKE 'B%'))

Which returns all of the movie titles rather than returning the specific ones (as it should only return 3 titles) but returns all of the 10 titles.

Answer 1

SELECT DISTINCT m.mvTitle from Movie m JOIN Actor a on a.actId = m.actId WHERE a.actName LIKE 'B%'

尝试一下...我选择使用联接而不是子选择-对我来说似乎更干净。

Answer 2

use correlated subquery

SELECT mvTitle
FROM Movie a
WHERE EXISTS (SELECT 1
              FROM Actor b
              WHERE a.actID = b.actID
                and b.actName LIKE 'B%')

Answer 3

SELECT mvTitle
FROM Movie where actID in (select actID from Actor where actName LIKE 'B%')