How to fix the Oracle error QSM-01061: illegal query expression?

In this post, you’ll learn more about the Oracle ErrorQSM-01061: illegal query expression with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

QSM-01061: illegal query expression

Reason for the Error QSM-01061: illegal query expression

An illegal query was specified. Specifically one of the following criteria was not satisfied: (a) All (non-constant, non-aggregate) SELECT expressions in the query should be made up of group expressions. (b) All column references in the HAVING clause should come from the GROUP BY expressions. (c) If there is an ORDER BY clause, then all column references should come from the GROUP BY or SELECT clause, depending on whether the query selects DISTINCT.

How to fix the Error QSM-01061: illegal query expression ?

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

Correct error in the syntax and rerun the query.