What is the purpose of the Sources section in an Aggregate?

The purpose of the Sources section in an Aggregate is to define the Entities from which the Aggregate retrieves records. This section is fundamental because it establishes the data foundation for the Aggregate operation. By selecting the specific Entities, you are essentially indicating where the data will come from, allowing the system to know which tables or data sources are involved in the query. This step is crucial for building meaningful and relevant data outputs within the application.

The other choices provide functions or elements that are involved in data processing but do not explain the role of the Sources section. For instance, defining values for testing the output records pertains more to the context of testing and validation, while defining conditions for subsets relates to filtering data. Lastly, ordering output records pertains to how the results will be displayed after retrieval, which involves a separate aspect of data manipulation. These functions complement the Aggregate operation, but the core purpose of the Sources section remains centered around specifying the Entities for data retrieval.