Chapter 3 Windows Database Applications

Technology designed to implement the UDA concept Standardized interface that allows reference to data from any source using the same programming tools


Data Access Objects (DAO 1-tier ) enabled programmers to access local databases in the Microsoft Jet Database Engine format, which were primarily Indexed Sequential Access Method (ISAM) files. After DAO came RDO. Remote Data Objects (2-tier) After RDO came ADO. ActiveX Data Objects (ADO 1 to n-tier)). These data access technologies were designed for a client / server paradigm. However the tendency of distributed computing forced the development of a new technology to solve the problems of data manipulation on a ntier architecture. ADO.NET is the evolution of ADO and its components have