Description: Entity mapping is the process of defining how entities in a database correspond to objects in an application. This process is fundamental in database design, as it establishes a clear relationship between stored data and its representation in application code. In the context of ETL (Extract, Transform, Load), entity mapping facilitates the integration of data from various sources, ensuring that information is transferred coherently and structured. On the other hand, in the NoSQL realm, entity mapping adapts to the flexible and unstructured nature of these databases, allowing developers to define how documents or records relate to application objects. This process not only enhances data management efficiency but also optimizes query performance and application scalability. In summary, entity mapping is an essential practice that connects the data world with software development, ensuring that information is handled effectively and utilized optimally in applications.
