What is aggregation behavior in data models?

< 1 min read

Aggregation behavior defines how numeric fields are summarized in reports.
It controls whether a column is summed, averaged, counted, or not aggregated.
In Power BI, this is set as default summarization in the model.
For example, Sales Amount should be summed, but Unit Price should not be summed.
In one project, incorrect aggregation of price caused inflated revenue numbers.
Measures also define aggregation behavior explicitly using DAX like SUM or COUNT.
Proper aggregation ensures accurate KPIs and prevents misleading totals.
So defining correct aggregation behavior is important during data modeling.

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