8014568b_cle_Database_with_Arun_Kaushik__Delete
[Point] 13. Complex views [Truncate] We cannot truncate a view simple or complex but you can truncate MV with special Features like Preserve MV Logs and Purge MV Logs. [Delete] 
You cannot delete data from a Complex view except through INSTEAD OF triggers. But we can delete data from simple Views and MV.
Dive in Oracle Database with Arun Kaushik
Delete