Relations are classified into normal forms based on the types of modification anomalies that they are vulnerable to.

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This is a true statement. Relations are indeed classified into normal forms based on the types of modification anomalies that they are vulnerable to. Normalization is the process of designing a database schema that minimizes redundancy and dependency issues by ensuring that each relation satisfies a certain level of normal form. The normal forms, ranging from first normal form (1NF) to fifth normal form (5NF), address different types of anomalies that can occur when modifying or querying the data in a relation. By achieving a higher normal form, a relation becomes less prone to such anomalies and more efficient and consistent in its data storage and retrieval.

Relations Are Classified into Normal Forms Based on the Types