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freeCodeCamp/curriculum/challenges/chinese/07-scientific-computing-with-python/python-for-everybody/relational-database-design.md

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---
id: 5e7b9f180b6c005b0e76f08c
challengeType: 11
videoId: AqdfbrpkbHk
---
## Description
<section id='description'>
</section>
## Tests
<section id='tests'>
```yml
question:
text: |
What is the best practice for how many times a piece of string data should be stored in a database?
answers:
- |
0
- |
1
- |
2
- |
3
solution: 2
```
</section>