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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, title, challengeType, videoId, bilibiliIds, dashedName
id title challengeType videoId bilibiliIds dashedName
5e7b9f180b6c005b0e76f08c 关系数据库设计 11 AqdfbrpkbHk
aid bvid cid
504388066 BV1Qg411j742 377532216
relational-database-design

--question--

--text--

对于一个字符串数据应该被保存在一个数据库里多少次，最佳实践是什么？

--answers--

0

1

2

3

--video-solution--

2