Is it necessary to normalize data when designing a database?

Data normalization is the process of organizing data in a database to reduce redundancy and ensure integrity. It is not always mandatory, but it is generally recommended, especially in the initial stages of database design.

Advantages of normalization:

• Reducing data duplication
• Facilitating data maintenance and updates
• Improving integrity and consistency

However, in some cases, such as to enhance read performance, denormalization is allowed — a conscious introduction of redundancy.

In conclusion: normalization is important for a proper database structure, but the decision depends on specific requirements and use scenarios.