Apama 10.15.0 | Developing Apama Applications | EPL Reference | Aggregate Functions
 
Aggregate Functions
 
Built-in aggregate functions
Custom aggregates
In stream queries, you can specify aggregate functions in the select clause. An aggregate function calculates a single value across all items currently in the window. EPL provides a number of commonly used aggregate functions. If a supplied aggregate function does not meet your needs, you can define a custom aggregate function.
See also Stream queries.