How to fix the Oracle error QSM-02177: MV with UNION ALL in a view must match the view’s SELECT list?

In this post, you’ll learn more about the Oracle ErrorQSM-02177: MV with UNION ALL in a view must match the view’s SELECT list with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-02177: MV with UNION ALL in a view must match the view’s SELECT list

Reason for the Error QSM-02177: MV with UNION ALL in a view must match the view’s SELECT list

If a materialized view has a view whose definition involves a UNION ALL query, then the materialized view’s select list must match the underlying view’s select list exactly. It must not have any expressions and must not have add/drop/reorder columns from the underlying view.

How to fix the Error QSM-02177: MV with UNION ALL in a view must match the view’s SELECT list ?

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

Use select * when defining a materialized view with a UNION ALL in a view.