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17. ADO and OLE DB > 17.3. ADO and OLE DB

ADO and OLE DB

As we have seen, the DAO model is the programming interface for the Jet database engine. On the other hand, ADO has a more ambitious goal—it is the programming model for a universal data-access interface called OLE DB. Simply put, OLE DB is a technology that is intended to be used to connect to any type of data—traditional database data, spreadsheet data, web-based data, text data, email data, and so on.

Technically speaking, OLE DB is a set of COM interfaces. An interface is just a collection of functions, also called services, with a similar purpose. The term COM refers to the Component Object Model , which is Microsoft’s model for communication between software components. Thus, simply put, OLE DB is a set of functions or services.


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