How to fix the Oracle error XOQ-01910: The level hierarchy has no hierarchy levels.?

In this post, you’ll learn more about the Oracle ErrorXOQ-01910: The level hierarchy has no hierarchy levels. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

XOQ-01910: The level hierarchy has no hierarchy levels.

Reason for the Error XOQ-01910: The level hierarchy has no hierarchy levels.

Cause: Hierarchy levels were not created on the level hierarchy.

How to fix the Error XOQ-01910: The level hierarchy has no hierarchy levels. ?

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

Action: Create at least one level for the hierarchy.