Loader can process a range of Loader commands and SQL statements, including Loader-specific commands for exporting data.
Syntax
<export_command> ::= <export_db_command> | <export_user_command> | <export_schema_command> | <export_table_command> | <export_columns_command>
With the range of commands provided by Loader you can export a complete database or parts of it, such as user objects, schema objects, data from a table, or a set of column values from a table.
Loader Tutorial, Exporting