How do you know there is always at least one primary key, Computer Engineering

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How do you know there is always at least one primary key

Problem

1. Define the term primary key in terms of functional dependencies.

2. If you assume that a relation has no duplicate data, how do you know there is always at least one primary key?

The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.

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Computer Engineering: How do you know there is always at least one primary key

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Computer Engineering: How do you know there is always at least one primary key

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