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When you run the Export utility against an Oracle database, objects (such as tables) are extracted, followed by their related objects (such as indexes, comments, and grants), if any.
The extracted data is written to an export dump file.
For example, direct path load cannot be used on clustered tables or on tables for which there are transactions pending.
See for a complete discussion of situations in which direct path load should and should not be used.
This allows export and import operations to run concurrently, minimizing total elapsed time.
Data Pump Export and Import also provide a set of interactive commands so that you can monitor and modify ongoing export and import jobs.
The dump file set can be imported to the same database or it can be moved to another system and loaded into the Oracle database there.This is done by using Data Pump parameters to specify export and import modes, as well as various filtering criteria.You can also perform exports and imports over a network.Conventional Path A conventional path load is the default loading method.It executes SQL statements to populate tables in an Oracle database.