BEA vice president, AquaLogic Paul Patrick, chief architect, said: "In the application development process, up to 70% of the application development time spent accessing different data. Therefore, in the SOA, the data should be first and foremost a service function one of the objects. Because many companies in the SOA, the data from the application and decouple the data source, or to extract data, so they need more data than ever before, control, and ensure regulatory compliance. ALDSP 2.5 can make the original confined to the enterprise data warehouse in a variety of independent data into Web services, and aggregates, is a service-driven enterprise that provides real-time data engine power. "
Because these two methods have shortcomings, here to provide a solution oracle Oracle database and heterogeneous data sources-Oracle solution to the problem of heterogeneous services. Run effects shots, "heterogeneous services" is integrated in the Oracle 8i database software features, which provides access from the Oracle database, Oracle database, other non-General. Readers familiar with Oracle are well aware, Oracle DB Link provides the method through the establishment of non-local database access, and "heterogeneous services" provided through the establishment of DB Link enables you to perform Oracle SQL query, transparent access to other non-Oracle data in the database as access to Oracle as the remote database. "Heterogeneous services" is divided into two types: