How to fix the Oracle error ORA-40181: invalid transformation definition for column string?

In this post, you’ll learn more about the Oracle ErrorORA-40181: invalid transformation definition for column string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-40181: invalid transformation definition for column string

Reason for the Error ORA-40181: invalid transformation definition for column string

Transformation definition has duplicate or NULL columns.

How to fix the Error ORA-40181: invalid transformation definition for column string ?

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

Provide a valid transformation definition specification.