How to fix the Oracle error QSM-02144: aggregate functions are present without a GROUP BY clause?

In this post, you’ll learn more about the Oracle ErrorQSM-02144: aggregate functions are present without a GROUP BY clause with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-02144: aggregate functions are present without a GROUP BY clause

Reason for the Error QSM-02144: aggregate functions are present without a GROUP BY clause

One or more aggregate functions are present in the select list but a GROUP BY clause is not used.

How to fix the Error QSM-02144: aggregate functions are present without a GROUP BY clause ?

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

Add a GROUP BY clause.