Universal Data Access and OLE DB. Customer Requirements for Data Access Technologies. High-Performance access to data Reliability Vendor Commitment Broad industry support. Universal Data Access.
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OLE DB is Microsoft’s strategic strategic system-level programming interface to data across the organization
OLE DB is an open specification designed to build on the success of ODBC by providing an open standard for accessing all kinds of data.
OLE DB is designed for relational and nonrelational information sources, including mainframe ISAM/VSAM and hierarchical databases; e-mail and file system stores; text, graphical and geographical data; custom business objects; and more.
ADO is application-level programming interface to data and information over OLE DB data.
ADO provides consistent, high-performance access to data and supports a variety of development needs, including the creation of front-end database clients and middle-tier business objects, using applications, tools, languages or Internet browsers.
ADO is designed to be the one data interface needed for one-to-multitier client/server and Web-based data-driven solution development.
ADO provides an easy-to-use application level interface to OLE DB, which provides the underlying access to data.
ADO is implemented with a small footprint, minimal network traffic in key scenarios, and a minimal number of layers between the front end and data source — all to provide a lightweight, high-performance interface.
ADO was designed to combine the best features of - and eventually replace - RDO and DAO
Programming language neutral. ADO can be used from languages such as Visual Basic, Java, C++, VBScript, and JScript.
Provider neutral. ADO can access data from any OLE DB source. In addition, ADO adapts gracefully to support less functional OLE DB providers.
No loss of OLE DB functionality. ADO allows C++ programmers access to the underlying OLE DB interfaces.
Extensible. ADO can dynamically expose properties specific to a data provider via collections of provider properties. In addition, it provides type extensibility by allowing access to COM objects exposed as column values.