About Accessing and Modifying Information in Non-Oracle Databases

You can use distributed SQL to federate data not only in an Oracle database, but in non-Oracle databases as well. Oracle Database Gateway enables Oracle databases to access and modify data in a number of non-Oracle databases, including Sybase, DB2, Informix, Microsoft SQL Server, Ingres, and Teradata databases. This access is completely transparent to the end user. That is, you can issue the same SQL statements regardless of whether you are accessing data in an Oracle database or a non-Oracle database.