Why Do Relational Databases Use Primary Keys and Foreign Keys

question 101

Multiple Choice

Why do relational databases use primary keys and foreign keys?

• A)to create an entity
• B)to create physical relationships
• C)to create logical relationships
• D)to create an attribute

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Definitions:

Excludes Note

A term used in medical coding to signify that certain conditions are to be coded elsewhere or are not included for coding with the code being referenced.

Includes Note

A term used in medical coding and classification to specify that a particular category or code also includes certain conditions or concepts.

Seventh Characters

In the context of medical coding, additional characters used to provide more specific information about the diagnosis or condition.

Initial Encounter

The first meeting between a patient and healthcare provider for the evaluation and treatment of a medical condition.