Loader can process a range of Loader commands and SQL statements, including Loader-specific commands for importing data.
Syntax
<import_command> ::= <import_db_command> | <import_user_command> | <import_schema_command> | <import_table_command> | <import_columns_command>
The range of Loader commands enables you to import a complete database or part of a complete database, such as, database user objects, schema objects, data from a table, or a set of column values from a table.
Loader Tutorial, Importing