How to fix the Oracle error QSM-02140: agg(expr) requires correspondng SUM(expr*expr) function?

In this post, you’ll learn more about the Oracle ErrorQSM-02140: agg(expr) requires correspondng SUM(expr*expr) function with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-02140: agg(expr) requires correspondng SUM(expr*expr) function

Reason for the Error QSM-02140: agg(expr) requires correspondng SUM(expr*expr) function

The capability in question is not supported when the materialized view uses certain aggregate functions but omits an invocation of the SUM function on the square of the same argument (the argument multiplied by itself).

How to fix the Error QSM-02140: agg(expr) requires correspondng SUM(expr*expr) function ?

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

Add the SUM function on the square of the argument.