Second Normal Form (2NF) helps make sure that a table in a database is organized so that all the information in each row depends only on the whole key, not just part of it. This makes the database easier to understand and helps prevent mistakes or confusion when adding or changing data.

Second Normal Form (2NF)

Second Normal Form (2NF) is a stage in the normalization process of a relational database where a table is in First Normal Form and all non-key attributes are fully functionally dependent on the primary key. This ensures that there are no partial dependencies of any column on the primary key, thereby reducing redundancy and improving data integrity.

Second Normal Form

Database Organization

Information dependence

whole key

Partial Key

Understanding databases

Preventing mistakes in databases

Data addition

Data changing

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