In database normalization what is the primary goal of the Th

In database normalization what is the primary goal of the th - CompTIA DataSys+ DS0-001

Question

In database normalization, what is the primary goal of the Third Normal Form (3NF)?

Answers

To remove duplicate columns from the same table
To ensure that every non-key column is dependent on the primary key
To separate different types of data into different tables
correct

To eliminate transitive dependencies on non-primary-key attributes

Explanation

Correct Answer: d. To eliminate transitive dependencies on non-primary-key attributes

The primary goal of the Third Normal Form (3NF) is to eliminate transitive dependencies, where a non-key attribute depends on another non-key attribute rather than directly on the primary key.

Achieving 3NF ensures that every non-key column is not only functionally dependent on the primary key but also independent of other non-key columns. This prevents redundancy and improves data integrity within relational database structures.

Why the Other Choices Are Incorrect :

A. To remove duplicate columns from the same table: This is a characteristic of First Normal Form (1NF), which deals with eliminating repeating groups and ensuring atomicity in each field. It does not directly relate to the goals of 3NF.
B. To ensure that every non-key column is dependent on the primary key: This describes Second Normal Form (2NF). While this is a step toward normalization, 3NF takes it further by also eliminating transitive dependencies beyond just direct dependency on the primary key.
C. To separate different types of data into different tables: This is a general benefit of normalization but not the specific goal of 3NF. The core aim of 3NF is targeting transitive dependencies, not just general data separation.

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