Data Aggregation

Data aggregation is the process of combining data from multiple sources, records, or time periods into a unified view or summary. It can mean combining raw records (aggregating product prices from multiple retailers) or computing statistical summaries (average price per neighborhood, median days on market by property type).

In retail, an API that returns results from multiple stores in a single query is performing aggregation on your behalf - one of the primary value propositions of multi-store APIs. In real estate, aggregating sold transactions over time yields market trend metrics.

Pre-aggregated data from an API is far more convenient than raw records you must aggregate yourself. When evaluating APIs, note whether you need to aggregate responses yourself or whether the API provides summary endpoints that return computed metrics directly.