列出出现“哈里森福特”的电影

Question

Why is the answer to this question incorrect?

Database

movie (id(PK),  title,  yr,     director(FK),   budget,     gross)
actor (id(PK),  name )
casting (movieid(PK, FK),   actorid(PK, FK),    ord)

Question: List the films in which 'Harrison Ford' has appeared (original link here )

My answer:

select title
from movie
were id IN
(
    select movieid as id
    from casting
    where actorid IN 
    (
        select id as actorid
        from actor
        where name = 'Harrison Ford'
    )
) X

Answer 1

After correcting were -> where and removing the trailing X the syntax and result where correct.

select title
from movie
where id IN
(
    select movieid as id
    from casting
    where actorid IN 
    (
        select id as actorid
        from actor
        where name = 'Harrison Ford'
    )
)

Error message indicated it was using MariaDB

Answer 2

    select title from movie inner join casting on (movie.id = casting.movieid)
    inner join actor on (casting.actorid = actor.id)
    where actor.name = 'Harrison Ford'

Please use the above SQL code for this question on SQL Zoo; it is in the exercise related to "More Joins". Hence you should be using Joins to solve it

Answer 3

My solution using CTE and JOIN :

-- find the movieid in which Harrison Ford played
WITH t AS (
    SELECT DISTINCT movieid
    FROM actor
    JOIN casting ON actor.id = casting.actorid
    WHERE name = 'Harrison Ford'
)

-- Get the movie title using a simple inner join
SELECT title
FROM movie
JOIN t ON movie.id = t.movieid