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15,023 Points

I need help with my code.

I need help with my code on this challenge: https://teamtreehouse.com/library/integrating-php-with-databases/using-relational-tables/joining-tables

this is my code and I didnt understand whats wrong with it..

SELECT * FROM Media JOIN Genres ON Media_Genres.genre_id = Genres.genre_id LEFT OUTER JOIN Media ON Media_Genres.media_id = Media.media_id WHERE Media_Genres.media_id=3;

1 Answer

Ruud Claassen
Ruud Claassen
9,359 Points

Make sure you build the query step by step:

  • Start with the Media table
  • Add the common table (Media_Genres) to be able to "connect" the right Genres to the Media item
  • The Media_Genres table should be joined based on the Media_id
  • Now the Media_Genres is connected, you can join the Genres table
  • Genres.genre_id can be connected to the Media_Genres.genre_id

Ultimately you will end up with:

JOIN Media_Genres ON Media_Genres.media_id = Media.media_id
JOIN Genres ON Genres.genre_id = Media_Genres.genre_id
WHERE Media.media_id = 3;
15,023 Points

Thank you soo much for your help.