Candidate key

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

In collections

Nobody has pulled it yet.

What Wikipedia says

A candidate key, or simply a key, of a relational database is any set of columns that have a unique combination of values in each row, with the additional constraint that removing any column could produce duplicate combinations of values.

Excerpt from the Wikipedia article “Candidate key”, under the CC BY-SA 4.0 license. Read the article on Wikipedia