Oracle Error ORA-30365: left relation in the JOIN KEY clause cannot be same as right

Oracle Error Message

ORA-30365: left relation in the JOIN KEY clause cannot be same as right

Reason for the Error

The relation of the child columns on the left side of the JOIN KEY clause was the same as that of the parent level on the right side.

Solution

Remove the JOIN KEY clause. It is not required or allowed when the child and the parent are in the same relation.