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Posted by Alejandro Cavazos
Alejandro Cavazos
4,250 Points

SQL Code Challenge - Please help!

Hello Treehouse! I am having the following problem with a SQL Code Challenge. I've tried lots and lots of queries and I've had no luck.

Here is the code challenge: Code Challenge

Here is the query I am using:

SELECT title, name
FROM movies
INNER JOIN name ON movies.genre = genres.id

Thanks in advance. This challenge is driving me crazy and won't let me complete the stage.

2 Answers

Guillaume Maka
PLUS
Guillaume Maka
Courses Plus Student 10,224 Points
Guillaume Maka
Guillaume Maka
Courses Plus Student 10,224 Points

Try

SELECT title, name 
FROM movies 
INNER JOIN genres 
ON movies.genre_id = genres.id;

You have two choices for INNER JOIN

SELECT column_name(s)
FROM table1
INNER JOIN table2
ON table1.column_name=table2.column_name;

or:

SELECT column_name(s)
FROM table1
JOIN table2
ON table1.column_name=table2.column_name;
Alejandro Cavazos
Alejandro Cavazos
4,250 Points

Big big thankyou! This was annoying me to death.

Alejandro Cavazos
Alejandro Cavazos
4,250 Points

Oh well, I realized that the second question is even harder. This time, asking for an outer join. How would the outer join version go?

Like before, bring back the movie 'title' and genre 'name' but use the correct OUTER JOIN to bring back all movies, regardless of whether the 'genre_id' is set or not.

Guillaume Maka :)

Guillaume Maka
Guillaume Maka
Courses Plus Student 10,224 Points
Guillaume Maka
Guillaume Maka
Courses Plus Student 10,224 Points 
SELECT title, name 
FROM movies 
LEFT OUTER JOIN genres 
ON movies.genre_id = genres.id;
Guillaume Maka
PLUS
Guillaume Maka
Courses Plus Student 10,224 Points
Guillaume Maka
Guillaume Maka
Courses Plus Student 10,224 Points 
SELECT title, name 
FROM movies 
LEFT OUTER JOIN genres 
ON movies.genre_id = genres.id;
Alejandro Cavazos
Alejandro Cavazos
4,250 Points

You did it again, thanks for helping me finish the stage!