In a scenario where an application requires multiple types of user roles with shared and unique attributes, which inheritance strategy would be most efficient and why?
- TPC: This strategy maps each concrete class to its own table, providing a clear separation of concerns and potentially simplifying queries.
- TPH: This strategy minimizes the number of tables in the database, leading to simpler queries and potentially better performance.
- TPT: This strategy ensures that each entity type has its own table, which can improve query performance by reducing the size of individual tables.
- Table Per Hierarchy (TPH) strategy: Combines all entity types into a single table. Table Per Type (TPT) strategy: Creates a separate table for each type. Table Per Concrete class (TPC) strategy: Creates a table for each concrete class in the inheritance hierarchy. Table Splitting: Splits the properties of a single entity into multiple tables.
Table Per Hierarchy (TPH) strategy combines all entity types into a single table, which can lead to more efficient queries as it minimizes joins and reduces the complexity of the database schema. However, it may result in unused columns for certain entity types and can make the table less normalized. This strategy is suitable when there are few unique attributes across different types and when query performance is a priority.
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