How to fix the Oracle error QSM-02118: duplicate grouping sets?

In this post, you’ll learn more about the Oracle ErrorQSM-02118: duplicate grouping sets with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-02118: duplicate grouping sets

Reason for the Error QSM-02118: duplicate grouping sets

The capability in question is not supported when the materialized view redundantly references grouping sets.

How to fix the Error QSM-02118: duplicate grouping sets ?

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

Re-phrase the query to avoid the use of the redundant grouping sets.