How to fix the Oracle error ORA-30399: a skip level must have at least one column that allows NULL values?

In this post, you’ll learn more about the Oracle ErrorORA-30399: a skip level must have at least one column that allows NULL values with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-30399: a skip level must have at least one column that allows NULL values

Reason for the Error ORA-30399: a skip level must have at least one column that allows NULL values

A SKIP clause cannot be specified with a level when all of the columns that make up the level have NOT NULL constraints.

How to fix the Error ORA-30399: a skip level must have at least one column that allows NULL values ?

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

Drop the SKIP clause.