In this post, you’ll learn more about the Oracle ErrorORA-18120: XUDY0021 – The result XDM instance violates XDM constraints with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-18120: XUDY0021 – The result XDM instance violates XDM constraints
Reason for the Error ORA-18120: XUDY0021 – The result XDM instance violates XDM constraints
XDM instance resulting from applying all the updates in a query violated constraint specified in [XQuery/XPath Data Model (XDM)]. In this case, none of the updates in the query were made effective.
How to fix the Error ORA-18120: XUDY0021 – The result XDM instance violates XDM constraints ?
You can fix this error in Oracle by following the below steps
None