chapter 13 © 2000 prentice hall chapter 13 accessing the database server: odbc, ole db, and ado...

Chapter 13

© 2000 Prentice Hall

Chapter 13Accessing the Database

Server: ODBC, OLE DB, and ADO

David M. Kroenke

Database Processing

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Typical Web Server

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ODBC

Open Database Connectivity;DBMS-independent means for

processing relational database data– ORACLE– SYBASE– INFORMIX

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ODBC Terminology

• Data source the database, its associated DBMS, operating system, and network platform

• Driver manager intermediary between the application and DBMS drivers

• Driver processes ODBC requests and submits SQL statements to a data source

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Role of ODBC Standard

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ODBC Architecture

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Conformance Levels

• ODBC concerned with API application program interface

• SQL– Minimum– Core– Extended

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ODBC Data Source Types

• File shared among database users• System local to a single computer• User only available to the user

who created it

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OLE DB

Object Linking and Embedding Database;

Provides an object-oriented interface to data of almost any type and used as an interface to ODBC and non-relational data

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Object Terminology

• Abstraction a generalization of something

• Method actions that an object can perform

• Property a characteristic of a recordset abstraction

• Collection object that contains a group of other objects

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Role of OLE DB

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OLE DB Goals

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OLE DB Data Providers

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ADO

Active Data Objects;an interface that enables

programmers in almost any language (including scripting) to access OLE DB functionality

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Role of ADO

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ADO Object Model

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