Why Do Relational Databases Use Primary Keys and Foreign Keys

question 14

Multiple Choice

Why do relational databases use primary keys and foreign keys?

• A) To create a database.
• B) To create physical relationships.
• C) To create logical relationships.
• D) All of these.

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Definitions:

Animals

Multicellular, eukaryotic organisms in the kingdom Animalia, characterized by their ability to move, consume organic material, breathe oxygen, and reproduce sexually.

Fungi

A kingdom of organisms that includes yeasts, molds, and mushrooms, which do not carry out photosynthesis and may be decomposers or pathogens.

Bacteria

Microscopic, single-celled organisms found in diverse environments; essential for various biological processes but can also cause disease.

Defective Meiosis

Defective meiosis refers to errors in the process of meiosis, which can result in genetic anomalies such as chromosomal missegregations, leading to infertility or genetic disorders.