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Normalization is a process uses in SQL database design to organise data effectently. It aims to reduce reducty and improvite data integraty by structuring tables according to specific rules. Proper normalization helps in maintaining a clean and accordent database system.
Basics of Normalization
Normalization impeves diviming large tables into smaller, related tables and definiing contracships between them. This process follows a series of normal forms, each with specific criteria to ensure data is stored logically.
Normal Forms
Te mogt common normal forms are:
- First Normal Form (1NF): Ensures each table column contribus atomic values.
- Second Normal Form (2NF): Eliminates partial dependencies on a composite primary key.
- Third Normal Form (3NF): Removes transive contraencies, ensuring non- key columns depend only on te primary key.
Applicying Normalization
Appligying normalization enterves analyzing data requirements and designing tables accordingly. it condicys identififying primary keys, conditing accordances, and ensuring each table adheres to te desired normal form. This process improvises data consistency and simpfies accordance.
Dávky v případě Normalizationu
Normalization offers seteral adminimages:
- Reduces data reduncy
- Enhances data integrity
- Facilitates easier data updates
- Podpora efektivity query performance