2021-05-05 10:13:49 -07:00
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---
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id: 5e7b9f180b6c005b0e76f08d
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2021-06-28 20:01:36 +05:30
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title: 在關係型數據庫中表示關係
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2021-05-05 10:13:49 -07:00
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challengeType: 11
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videoId: '-orenCNdC2Q'
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2021-10-03 12:24:27 -07:00
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bilibiliIds:
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aid: 931953070
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bvid: BV1FM4y1N7hc
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cid: 377532529
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2021-05-05 10:13:49 -07:00
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dashedName: representing-relationships-in-a-relational-database
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---
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# --question--
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## --text--
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2021-06-28 20:01:36 +05:30
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什麼是外鍵？
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2021-05-05 10:13:49 -07:00
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## --answers--
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2021-06-28 20:01:36 +05:30
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一個不應存在於這裏的鍵
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2021-05-05 10:13:49 -07:00
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---
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2021-06-28 20:01:36 +05:30
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一個使用非拉丁字符的鍵
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2021-05-05 10:13:49 -07:00
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---
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2021-06-28 20:01:36 +05:30
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一個指向不同表中關聯行的主鍵的數字
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2021-05-05 10:13:49 -07:00
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---
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2021-06-28 20:01:36 +05:30
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一個在“現實世界”中可能用於查找行的鍵
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2021-05-05 10:13:49 -07:00
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## --video-solution--
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3
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