How to fix the Oracle error QSM-02014: GROUP BY expression other than a column?

In this post, you’ll learn more about the Oracle ErrorQSM-02014: GROUP BY expression other than a column with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-02014: GROUP BY expression other than a column

Reason for the Error QSM-02014: GROUP BY expression other than a column

The capability in question is not supported when the materialized view uses an expression other than a simple column reference in the GROUP BY clause.

How to fix the Error QSM-02014: GROUP BY expression other than a column ?

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

Re-phrase the query to use only simple column expressions in the GROUP BY clause.