You can create two kinds of aggregations:
SQL aggregations (strongly recommended) – SQL is a familiar query language that is well suited to data aggregation. Fusion’s new SQL Aggregation Engine has more power and flexibility than Fusion’s legacy aggregation engine.
Legacy aggregations (deprecated) – This aggregation approach available in prior Fusion releases is still available, though it is deprecated and will be removed in a future release. Aggregator functions apply solely to legacy aggregations.
Aggregations are created automatically whenever you enable signals or recommendations. This topic explains how to create or modify aggregations individually. You can do this using the Fusion UI or the Jobs API. For more information, see Creating Aggregations.