How to fix the Oracle error QSM-02090: SELECT includes an expression that is not just a column?

In this post, you’ll learn more about the Oracle ErrorQSM-02090: SELECT includes an expression that is not just a column with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-02090: SELECT includes an expression that is not just a column

Reason for the Error QSM-02090: SELECT includes an expression that is not just a column

The capability in question is not supported when the materialized view uses an expression in the select list that is not a simple column reference.

How to fix the Error QSM-02090: SELECT includes an expression that is not just a column ?

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

Re-phrase the query to avoid the use of the expressions that are not simple column references.