Question

I have the following query that has no errors:

SELECT u.user_name, u.user_lastn, outer_s.movie_id, outer_s.times_rented
FROM users u,
    ( 
        SELECT * FROM  
        (   
            SELECT user_id, movie_id, count (movie_id) as times_rented
            FROM movie_queue 
            GROUP BY (user_id, movie_id)
            ORDER BY user_id, movie_id 
        ) inner_s
        WHERE times_rented>1
    ) outer_s    
WHERE u.user_id= outer_s.user_id;

This is what it returns:

USER_NAME                USER_LASTN                 MOVIE_ID TIMES_RENTED
------------------------ ------------------------ ---------- ------------
John                     Smith                             1            3 
John                     Smith                             6            2 
Mary                     Berman                            4            2 
Mary                     Berman                            6            4 
Elizabeth                Johnson                           1            2 
Peter                    Quigley                           2            2 

What I still need to do is to show the name of the movie, instead of the movie_id, but
the name of the movies are located in another table named movies that is similar to the
following sample:

 MOVIE_ID  MOVIE_NAME                                                
---------- ---------------------------------------------
         1 E.T. the Extra-Terrestrial    
         2 Jurassic Park                
         3 Indiana Jones and the Kingdom of the Crystal     
         4 War of the Worlds  
         5 Signs  

Desired result:
What I want to see in the final table are the following columns:
USER_NAME | USER_LASTN | MOVIE_NAME | TIMES_RENTED |

Question:
But after all the many subqueries I am very confused, how can I get the movie_name there instead of the movie_id?

Attempted:
I tried getting the desired result by changing the query to

SELECT u.user_name, u.user_lastn, m.movie_name, outer_s.times_rented
FROM users u, movie m (etc.....)

But It returned 120 rows instead of the 6 I should get.

Help please!!

Answer 1

SELECT u.user_name, u.user_lastn, m.movie_name, COUNT(q.movie_id)
FROM users AS u
JOIN movie_queue AS q ON q.user_id = u.user_id
JOIN movie AS m ON m.movie_id = q.movie_id
GROUP BY u.user_name, u.user_lastn, m.movie_name
HAVING COUNT(q.movie_id) > 1