Apama Documentation : Developing Apama Applications : EPL Reference : Aggregate Functions
Aggregate Functions
 
Built-in aggregate functions
Custom aggregates
In Apama queries and in EPL 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 Select clause for information about the select clause in Apama queries.
See also Stream queries.
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