How to fix the Oracle error KUP-03021: clause references unknown field string?

In this post, you’ll learn more about the Oracle ErrorKUP-03021: clause references unknown field string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

KUP-03021: clause references unknown field string

Reason for the Error KUP-03021: clause references unknown field string

A WHEN, NULLIF or DEFAULTIF clause referenced a field that doesn’t exist in the data file.

How to fix the Error KUP-03021: clause references unknown field string ?

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

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