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freeCodeCamp/curriculum/challenges/chinese/07-scientific-computing-with-python/python-for-everybody/relational-databases-many-to-many-relationships.md

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---
id: 5e7b9f190b6c005b0e76f090
title: '关系型数据库:多对多关系'
challengeType: 11
videoId: z-SBYcvEQOc
bilibiliIds:
aid: 291965127
bvid: BV1Af4y1L7BK
cid: 377543409
dashedName: relational-databases-many-to-many-relationships
---
# --description--
更多资料:
\- [练习:电子邮件](https://www.youtube.com/watch?v=uQ3Qv1z_Vao)
\- [练习:名册](https://www.youtube.com/watch?v=qEkUEAz8j3o)
\- [练习:曲目](https://www.youtube.com/watch?v=I-E7avcPeSE)
\- [练习:推特好友](https://www.youtube.com/watch?v=RZRAoBFIH6A)
\- [练习:推特爬虫](https://www.youtube.com/watch?v=xBaJddvJL4A)
# --question--
## --text--
哪个是多对多关系的示例?
## --answers--
老师与学生
---
客户与订单
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书与内页
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城市与国家
## --video-solution--
1