Which of the following statements concerning attributes in aggregates is correct?

The statement that aggregation of attributes helps summarize data effectively is correct. In the context of using aggregates in OutSystems, aggregating attributes allows you to process and summarize large sets of data to obtain meaningful insights. This process often involves calculating totals, averages, counts, or other statistical measures that provide a clearer picture of the underlying data trends or patterns.

Aggregates condense multiple records into a single summary value, making it easier to analyze data as a whole rather than dealing with individual records. For instance, if you have sales data for a specific period, using aggregates can help summarize total sales, average sales per customer, and so forth, which is crucial for effective data analysis in applications.

The other statements do not align with the concept of data aggregation. Grouping attributes together does not necessarily require them to be of the same type, and including all attributes in every aggregate query is not required. Furthermore, attributes can be retrieved without being grouped, as aggregates can return individual items alongside their aggregated values.