SHAHRUKH KHAN 对 IMDB 数据集的 SQL 查询问题

如何解决SHAHRUKH KHAN 对 IMDB 数据集的 SQL 查询问题

问；演员的沙鲁克数是最短路径的长度 演员和沙鲁克汗之间的“合作”图表。那是， 沙鲁克汗的沙鲁克编号为 0；所有参与演出的演员 与沙鲁克相同的电影有沙鲁克 1 号；所有出演过的演员 与沙鲁克第一名演员的同一部电影有沙鲁克 number 2，以此类推。返回所有Shahrukh编号为2的演员

query9 ="""WITH SHAHRUKH_0
AS
    (
        SELECT
            TRIM(P.PID) PID
        FROM
            Person P
        WHERE
            Trim(P.NAME) = "Shah Rukh Khan"
    ),SHAHRUKH_1_MOVIES
AS
    (
        SELECT disTINCT
            TRIM(MC.MID) MID,S0.PID
        FROM
            M_Cast MC,SHAHRUKH_0 S0
        WHERE
            TRIM(MC.PID) = S0.PID
    ),SHAHRUKH_1_ACTORS
AS
    (
        SELECT disTINCT
            TRIM(MC.PID) PID
        FROM
            M_Cast MC,SHAHRUKH_1_MOVIES S1M
        WHERE
            TRIM(MC.MID) = S1M.MID
            AND TRIM(MC.PID) <> S1M.PID
    ),SHAHRUKH_2_MOVIES
AS
    (
        SELECT disTINCT
            TRIM(MC.MID) MID,S1A.PID
        FROM
            M_Cast MC,SHAHRUKH_1_ACTORS S1A
        WHERE
            TRIM(MC.PID) = S1A.PID
    )
SELECT disTINCT
    TRIM(P.Name) ACTOR_NAME
FROM
    Person P,M_Cast MC,SHAHRUKH_2_MOVIES S2M
WHERE
    TRIM(MC.PID) = TRIM(P.PID)
    AND TRIM(MC.MID) = S2M.MID
    AND TRIM(MC.PID) != S2M.PID;"""

s2 演员总数为 25698，但我得到了 26521。 请提出建议。