How to fix the Oracle error ORA-23371: column string unknown in table string?

In this post, you’ll learn more about the Oracle ErrorORA-23371: column string unknown in table string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-23371: column string unknown in table string

Reason for the Error ORA-23371: column string unknown in table string

Some column in “array_columns” argument (or “column_list” argument) to “differences()” routine does not correspond to a column in the specified table.

How to fix the Error ORA-23371: column string unknown in table string ?

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

Make sure that all the columns in either “array_columns” or “column_list” are present in the specified table.