How to fix the Oracle error ORA-12027: duplicate filter column?

In this post, you’ll learn more about the Oracle ErrorORA-12027: duplicate filter column with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12027: duplicate filter column

Reason for the Error ORA-12027: duplicate filter column

One or more of the specified filter columns were already being recorded in the materialized view log.

How to fix the Error ORA-12027: duplicate filter column ?

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

Describe the materialized view log table and reissue the SQL command with the filter columns that are already being recorded in the materialized view log.