Data Loading and Unloading

In this chapter, we will discuss data loading and unloading—in other words, how to get data into and out of an Oracle database. The main focus of the chapter is on the following bulk data loading tools:

  • External tables: This is a feature with Oracle9i and above that permits access to operating system files as if they were database tables and, in Oracle 10g and above, even allows for the creation of operating system files as extracts of tables.
  • SQL*Loader (pronounced “sequel loader” and hereafter referred to as SQLLDR): This is Oracle’s historical data loader that is still a common method for loading data. ...

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