MySQL - How to use subquery into IN statement by value - sql

Question

The question is to get table column data and use it as a value list for IN function;
For this example I created 2 tables: movies and genres
Table "movies" contains 3 columns: id, name and genre.
Table "genres" contains 2 columns: id and name.
+- movies-+
| |- movie_id - int(11) - AUTO_INCREMENT - PRIMARY
| |- movie_name - varchar(255)
| |- movie_genres - varchar(255)
|
|
+- genres-+
|- genre_id - int(11) - AUTO_INCREMENT - PRIMARY
|- genre_name - varchar(255)
Both tables contain some dummy data:
+----------+------------+--------------+
| movie_id | movie_name | movie_genres |
+----------+------------+--------------+
| 1 | MOVIE 1 | 2,3,1 |
| 2 | MOVIE 2 | 2,4 |
| 3 | MOVIE 3 | 1,3 |
| 4 | MOVIE 4 | 3,4 |
+----------+------------+--------------+
+----------+------------+
| genre_id | genre_name |
+----------+------------+
| 1 | Comedy |
| 2 | Fantasy |
| 3 | Action |
| 4 | Mystery |
+----------+------------+
My goal is to get result like this:
+----------+------------+--------------+-----------------------+
| movie_id | movie_name | movie_genres | movie_genre_names |
+----------+------------+--------------+-----------------------+
| 1 | MOVIE 1 | 2,3,1 | Fantasy,Action,Comedy |
| 2 | MOVIE 2 | 2,4 | Fantasy,Mystery |
| 3 | MOVIE 3 | 1,3 | Comedy,Action |
| 4 | MOVIE 4 | 3,4 | Action,Mystery |
+----------+------------+--------------+-----------------------+
I'm using this query and it's partly working only problem is that it uses the first value of the movie_genres field in the IN value list.
SELECT `m` . * , GROUP_CONCAT( `g`.`genre_name` ) AS `movie_genre_names`
FROM `genres` AS `g`
LEFT JOIN `movies` AS `m` ON ( `g`.`genre_id`
IN (
`m`.`movie_genres`
) )
WHERE `g`.`genre_id`
IN (
(
SELECT `movie_genres`
FROM `movies`
WHERE `movie_id` =1
)
)
GROUP BY 1 =1
The results greatly differ from the one I want:
+----------+------------+--------------+-------------------+
| movie_id | movie_name | movie_genres | movie_genre_names |
+----------+------------+--------------+-------------------+
| 1 | MOVIE 1 | 2,3,1 | Fantasy,Fantasy |
+----------+------------+--------------+-------------------+
Sorry if I missed some data I'm new to mysql.
What query should I use to get the wanted results?

Answer 1

This is a bad design. You should create a many-to-many link table (movie_id, genre_id)
If you cannot change this design, however, use this query:
SELECT movie.*
(
SELECT GROUP_CONCAT(genre_name)
FROM genres
WHERE find_in_set(genre_id, movie_genres)
) as movie_genre_names
FROM movies