If a data model is normalized to 3nf, can we always say the model is a good design for the business?

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16-08-2022
Business

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If a data model is normalized to 3nf, can we always say the model is a good design for the business?

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Tutorconsortium363 Tutorconsortium363 · Answer 1 · 2022-08-21T10:00:09+02:00

Database normalization is a technique of organizing the data in the database. Normalization is a formal approach that applies a set of rules to associate attributes with entities. Normalization is used when designing a database.

Database normalization

Database normalization is mainly used to:

Eliminate reduntant data.
Ensure data is logically stored (results in a more flexible data model).

Normalization of a data model consists of several steps. These steps are called normalization rules. Each rule is referred to as a normal form (1NF, 2NF, 3NF). The first three forms are the most important ones. There are more than 3 normal forms but those forms are rarely used and can be ignored without resulting in a non flexible data model. Each normal form constrains the data more than the previous normal form. This means that you must first achieve the first normal form (1NF) in order to be able to achieve the second normal form (2NF). You must achieve the second normal form before you can achieve the third normal form (3NF).

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