Learn the purpose and how to unravel the ORA-01779 error message in Oracle.
When you encounter an ORA-01779 error, the following error message will appear:
ORA-01779: can’t alter a column which maps to a non-key-preserved desk
You tried to INSERT or UPDATE columns in a be a part of view which map to a non-key-preserved table.
The option(s) to resolve this Oracle error are:
Try updating the tables directly.