SQL - 演員之間的關系

Question

我有一個包含2列的單個表：演員和電影，如下所示：

ACTOR  | MOVIE
-------+-------------
Volta  | Pulp Fiction
Bruce  | Pulp Fiction
Rhame  | Pulp Fiction
Walke  | Pulp Fiction
Rhame  | Bad Movie
Bruce  | Bad Movie
Volta  | Decent Movie
Brian  | Decent Movie
Walke  | Awesome Movie
Brian  | Awesome Movie

我想知道哪些演員出現在低俗小說中，從未出現在與另一位來自制漿小說的演員的另一部電影中。

從這個例子中，輸出應該是：

Volta
Walke

因為他們分別出現在低俗小說和體面電影和令人敬畏的電影中，沒有任何其他演員來自低俗小說。

我正在使用MySQL。

Answer 1

SELECT m.actor
FROM movies m 
WHERE 
m.movie = 'Pulp Fiction'
AND NOT EXISTS
(
  SELECT 1
  FROM movies m1 
    JOIN movies m2 ON m1.movie = m2.movie 
      AND m1.actor <> m2.actor 
      AND m2.movie <> 'Pulp Fiction' 
      AND m2.actor IN (SELECT actor FROM movies WHERE movie = 'Pulp Fiction')
  WHERE
      m.actor = m1.actor 
)

根據ChrisProsser所做的SQLFiddle，它應該給出正確的結果。

Answer 2

可能有一種更簡單的方法，但這應該有效：

select m.actor 
  from movies m
 where m.movie = 'Pulp Fiction'
   and m.actor not in (
       select m2.actor
         from movies m1,
              movies m2,
              movies m3
        where m1.actor = m2.actor
          and m1.movie = 'Pulp Fiction'
          and m2.movie != m1.movie
          and m3.movie = m2.movie
          and m3.actor in (select m4.actor
                             from movies m4
                            where m4.movie = 'Pulp Fiction')
        group by m2.actor
        having count(*) > 1);

我創建了一個SQL Fiddle來測試它，輸出是正確的。

Answer 3

嘗試這個....

SELECT actor, movie 
FROM actor
where movie like 'Pulp Fiction' AND
movie NOT IN(select movie from tablename t where t.actor like actor and movie NOT LIKE 'Pulp Fiction');

Answer 4

SELECT actor FROM table AS t1  
WHERE movie = 'Pulp Fiction' AND  
NOT EXISTS( 
  SELECT 1 FROM table AS t2 WHERE t2.actor = t1.actor AND movie <> 'Pulp Fiction' 
) 

我建議您將電影和演員存儲在不同的表格中（“電影”表和“演員表”），然后使用“movie_actor”表將數據相互連接。