How to fix the Oracle error ORA-41693: invalid attribute or data type for an aggregate operator: string?

In this post, you’ll learn more about the Oracle ErrorORA-41693: invalid attribute or data type for an aggregate operator: string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-41693: invalid attribute or data type for an aggregate operator: string

Reason for the Error ORA-41693: invalid attribute or data type for an aggregate operator: string

An attempt was made to apply an aggregate operator on an invalid attribute or an attribute with invalid or unsupported data type in the aggregate operator. Only NUMBER and DATE attributes are allowed in the aggregate operators.

How to fix the Error ORA-41693: invalid attribute or data type for an aggregate operator: string ?

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

Correct the input and try again.