How to fix the Oracle error ORA-30337: multiple JOIN KEY clauses specified for the same parent level?

In this post, you’ll learn more about the Oracle ErrorORA-30337: multiple JOIN KEY clauses specified for the same parent level with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-30337: multiple JOIN KEY clauses specified for the same parent level

Reason for the Error ORA-30337: multiple JOIN KEY clauses specified for the same parent level

Multiple JOIN KEY clauses were specified for a given parent level in a dimension hierarchy.

How to fix the Error ORA-30337: multiple JOIN KEY clauses specified for the same parent level ?

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

Match up each JOIN KEY clause with the level it references in the hierarchy. Eliminate the redundant JOIN KEY clause.