June 2001
Intermediate to advanced
620 pages
19h 29m
English
Content preview from ADO: ActiveX Data ObjectsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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ADO in Context: Universal Data Access
Microsoft’s philosophy behind ADO and a series of related technologies is Universal Data Access ( UDA). UDA isn’t a tangible product or technology, but rather a strategy for attacking the problem of data access, whose goal is efficient and powerful data access, regardless of data source or development language. Moreover, this universal access is meant to eliminate the need to convert existing data from one proprietary format to another.
With this lofty goal in view, Microsoft developed a series of technologies, collectively known as Microsoft Data Access Components ( MDAC), that allow developers to implement UDA. MDAC consists of the following four key pieces:
ODBC (Open Database Connectivity)
OLE DB (Object Linking and Embedding Databases)
ADO (ActiveX Data Objects)
RDS (Remote Data Service)
These components implement the UDA vision both individually and as a whole. To best understand ADO in context, you should have a basic understanding of each MDAC technology and its relationship to ADO.
ODBC
Open Database Connectivity, or ODBC, provides access to relational databases through a standard API, addressing the problem of native application -- and platform-specific APIs and their lack of cross-application compatibility. ODBC’s industry-standard architecture offers an interface to any Database Management System (DBMS), such as SQL Server or Oracle, that uses the standard ODBC API. The main drawbacks of ODBC are the amount of work required to develop ...
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