Running aggregates

In the previous two sections, we learned about aggregate functions and then about ranking functions. With the help of ranking functions, we learned about framing. Beginning on SQL Server 2012, Microsoft introduced a feature using aggregate functions working over frames and windows. In this section, we will talk about this feature, which is called running aggregates. In the first part of the section, we will use common aggregate functions in combination with the OVER clause, and in the second part we will learn about percentile count.

Using aggregate functions in running aggregates

Aggregate queries are very common in tasks such as querying data for reporting purposes, processing data cubes in SQL Server...