How can you enable parallel DML at the session level?

Enabling parallel DML (Data Manipulation Language) at the session level is done through the command that explicitly specifies the intent to allow parallel execution of DML operations in that session. The command "ALTER SESSION ENABLE PARALLEL DML" is the correct syntax for achieving this.

When you execute this command, you instruct the Oracle database to allow operations such as INSERT, UPDATE, and DELETE to be executed in parallel, which can significantly improve performance for large data sets or processing tasks by utilizing multiple CPU resources effectively. This setting remains in effect for the current session until it is either specifically changed or the session ends.

Other options listed do not use the correct syntax or terminology to enable parallel DML, which is why they would not execute successfully in an Oracle database environment. This understanding of session-level configurations is essential for optimizing database performance, especially when working with large volumes of data.