How to fix the Oracle error QSM-02132: agg(expr) requires correspondng COUNT(expr) function?

In this post, you’ll learn more about the Oracle ErrorQSM-02132: agg(expr) requires correspondng COUNT(expr) function with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-02132: agg(expr) requires correspondng COUNT(expr) function

Reason for the Error QSM-02132: agg(expr) requires correspondng COUNT(expr) function

The capability in question is not supported when the materialized view uses certain aggregate functions but omits an invocation of the COUNT function on the same argument.

How to fix the Error QSM-02132: agg(expr) requires correspondng COUNT(expr) function ?

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

Add the COUNT function to the select list.