How to fix the Oracle error QSM-02152: subquery or named view in FROM list even after view merging?

In this post, you’ll learn more about the Oracle ErrorQSM-02152: subquery or named view in FROM list even after view merging with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-02152: subquery or named view in FROM list even after view merging

Reason for the Error QSM-02152: subquery or named view in FROM list even after view merging

You have specified a materialized view that references a subquery ore named view in its top level FROM list that could not be merged during the view merging process.

How to fix the Error QSM-02152: subquery or named view in FROM list even after view merging ?

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

Restructure the materialized view query.