---
id: 5e7b9f190b6c005b0e76f090
title: 'Relational Databases: Many-to-many Relationships'
challengeType: 11
isHidden: false
videoId: z-SBYcvEQOc
---

## Description
<section id='description'>
More resources:
- <a href="https://www.youtube.com/watch?v=uQ3Qv1z_Vao" target='_blank'>Exercise: Email</a>
- <a href="https://www.youtube.com/watch?v=qEkUEAz8j3o" target='_blank'>Exercise: Roster</a>
- <a href="https://www.youtube.com/watch?v=I-E7avcPeSE" target='_blank'>Exercise: Tracks</a>
- <a href="https://www.youtube.com/watch?v=RZRAoBFIH6A" target='_blank'>Exercise: Twfriends</a>
- <a href="https://www.youtube.com/watch?v=xBaJddvJL4A" target='_blank'>Exercise: Twspider</a>
</section>

## Tests
<section id='tests'>

```yml
question:
  text: |
    Which is an example of a many-to-many relationship?
  answers:
    - |
        teacher to student
    - |
        customer to order
    - |
        book to pages
    - |
        city to country
  solution: 1
```

</section>