How to fix the Oracle error QSM-02114: no GROUP BY clause, no aggregates and not >= 9.0 compatibility?

In this post, you’ll learn more about the Oracle ErrorQSM-02114: no GROUP BY clause, no aggregates and not >= 9.0 compatibility with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-02114: no GROUP BY clause, no aggregates and not >= 9.0 compatibility

Reason for the Error QSM-02114: no GROUP BY clause, no aggregates and not >= 9.0 compatibility

The capability in question is not supported when the materialized view has no GROUP BY clause, no aggregates and compatibility mode is less than 9.0.

How to fix the Error QSM-02114: no GROUP BY clause, no aggregates and not >= 9.0 compatibility ?

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

Re-phrase the query to avoid the include a GROUP BY clause or an aggregate function. Or set compatibility mode to 9.0 or greater.