Fabric RTI 101: Aggregating

When we talk about aggregation, we’re really talking about taking huge volumes of raw events and rolling them up into something that’s usable, measurable, and actionable. A raw stream might be thousands of individual events per second — each transaction, each sensor ping, each click. By themselves, they’re useful for tracing details, but they don’t tell the bigger story.

Aggregation lets us step back and say: Instead of looking at every single reading, let’s look at the total, the average, or the maximum over a period of time. Common aggregation functions are ones you already know — COUNT, SUM, AVG, MIN, MAX.

These functions help us turn data into metrics and KPIs that can be consumed at scale.

For example, a retailer might aggregate all point-of-sale transactions into total revenue per minute. That’s much easier to track in a dashboard than trying to follow every single receipt. In an IoT scenario, we could calculate the average temperature across all devices in a building every 10 seconds, rather than monitoring each device individually. For anomaly detection, we might track rolling maximum values, like the highest CPU usage in the last five minutes, to quickly spot problems.

Aggregation also helps control data volume and cost. Imagine if every dashboard had to query billions of raw events in real time. It wouldn’t be feasible. Instead, we pre-aggregate and reduce that firehose into compact metrics, which keeps queries fast and infrastructure efficient.

In practice, aggregations are often the bridge between raw streams and the dashboards or alerts that business users interact with. They allow executives to see KPIs like orders per minute or average response time, while analysts and engineers still have the option of drilling into the raw data if needed.

Aggregation is about compression with meaning: taking floods of raw events and turning them into real-time signals that people and systems can actually act on.

Learn more about Fabric RTI

If you really want to learn about RTI right now, we have an online on-demand course that you can enrol in, right now. You’ll find it at Mastering Microsoft Fabric Real-Time Intelligence

2026-04-05