Functional dependency

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Notion

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Science and technology

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What Wikipedia says

In relational database theory, a functional dependency (FD) is constraint between two attribute sets, whereby values in one set (the determinant set) determine the values of the other set (the dependent set). A functional dependency between a determinant set X and a dependent set Y can be described as follows:

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