How to fix the Oracle error ORA-01779: cannot modify a column which maps to a non key-preserved table?

In this post, you’ll learn more about the Oracle ErrorORA-01779: cannot modify a column which maps to a non key-preserved table with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-01779: cannot modify a column which maps to a non key-preserved table

Reason for the Error ORA-01779: cannot modify a column which maps to a non key-preserved table

An attempt was made to insert or update columns of a join view which map to a non-key-preserved table.

How to fix the Error ORA-01779: cannot modify a column which maps to a non key-preserved table ?

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

Modify the underlying base tables directly.