How to fix the Oracle error QSM-02041: nested aggregate function?

In this post, you’ll learn more about the Oracle ErrorQSM-02041: nested aggregate function with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-02041: nested aggregate function

Reason for the Error QSM-02041: nested aggregate function

The capability in question is not supported when the materialized view nests an aggregate function invocation as an argument to another aggregate function.

How to fix the Error QSM-02041: nested aggregate function ?

You can fix this error in Oracle by following the below steps

Re-phrase the query to avoid the nested aggregate function invocation.