Advantages of nonlogging tables

Nonlogging tables, which are also called raw tables, have characteristics that enable you to load very large data warehousing tables quickly.

Raw tables have following characteristics:

They do not use CPU and I/O resources for logging.
They avoid problems such as running out of logical-log space.
They are locked exclusively during an express load so that no other user can access the table during the load.
They do not support referential constraints and unique constraints, so overhead for constraint-checking is eliminated.