https://www.ibm.com/docs/en/ims/15.5.0?topic=programs-sql-aggregate-functions-supported-cobol
SQL aggregate functions are supported for COBOL and .NET applications (by using IMS Enterprise Suite IMS Data Provider for Microsoft .NET).
sql aggregate functionsapplication programmingimssupported
https://www.educative.io/courses/practical-data-analysis-with-sql/aggregate-expressions
Learn how to use aggregate expressions in SQL with window functions to calculate running and cumulative aggregates without grouping.
window functionsunderstandingaggregateexpressionssql