Oracle Error ORA-23371: column string unknown in table string

Oracle Error Message

ORA-23371: column string unknown in table string

Reason for the Error

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

Solution

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