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

I got ” ORA-01779: cannot modify a column which maps to a non key-preserved table ” error in Oracle database.

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

Details of error are as follows.

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

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

Action: Modify the underlying base tables directly.

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

This ORA-01779 errors are related with the attempt was made to insert or update columns of a join view which map to a non-key-preserved table.

You can Modify the underlying base tables directly and Try updating the tables directly.

Or You can use work around is to use  MERGE to do this.

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