What Is a Primary Key

question 21

Multiple Choice

What is a primary key?

• A)a field that uniquely identifies a given record in a table
• B)a primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables
• C)a table that uniquely identifies a given record in a field
• D)a foreign key of one table that appears as an entity in another table and acts to provide a logical relationship between the two records

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Definitions:

Random Elements

Unpredictable factors that can affect outcomes in various systems or processes, often incorporated into models and decision-making to account for uncertainty.

Policy Changes

Refers to modifications or adjustments made to existing rules, regulations, or guidelines within an organization, institution, or government.

Real-Life System

Refers to complex, operational systems that function in the real world, often encompassing human, technological, and environmental components.

Time-Consuming

Activities or processes that require a significant amount of time to complete, often implying inefficiency or labor intensity.