Today, more than ever, modern enterprises are using Web services for data sharing within and across the enterprise's boundaries. We call this kind of Web service as Data Providing Web services. In this paper, we present our approach to automatically compose primitive data providing Web services for the purpose of creating data integration applications. Our approach exploits existing mature works done in data integration systems. Specifically, data providing services are modeled as RDF Parameterized Views over mediated ontologies. Then, an RDF oriented query rewriting algorithm is used to compose services for answering received queries. The composition is then optimized and deployed as a new Web service accessible on top of the Web.