ODBC and JDBC.

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Presentation transcript:

ODBC and JDBC

Object Database Connectivity (ODBC) ODBC: Object Database Connectivity Ability to connect to a multitude of data sources using a single API. Based on the Call Level Interface specified by the SQL Access Group.

Object Database Connectivity (ODBC) Using vendor-supplied drivers to translate the ODBC commands into something understood by the DBMS, a single application can connect and communicate with multiple databases using a single, common set of commands. Example: Human Resources applications that pull employee data from three distinct DBMSs.

Java Database Connectivity (JDBC) Uses the same underlying concept of ODBC, but offers the portability of the Java programming language. 4 different kinds exist that depend on the JVM and third party software to different degrees.

JDBC Type 1: JDBC-ODBC Bridge JDBC calls are translated into ODBC commands. In this case, JDBC is a layer on top of ODBC. Requires at least that ODBC binaries be installed on each machine where an app using this type of JDBC is installed.

JDBC Type 2: JDBC Layered over a Native API Similar to the previous type in that binaries must be installed in addition to any apps that use this type of JDBC. Native APIs are supplied by vendors for translating JDBC calls into a form understood by their proprietary DBMSs.

JDBC Type 3: Pure Java Driver for Database Middleware All client-side code is written in pure Java that sends commands to a middleware program that translates them into a form understood the DBMS. According to Oracle, the middleware offers the ability to connect to many different databases.

JDBC Type 4: Direct-to-Database Pure Java Driver All code for the driver is written purely in Java. JDBC calls are converted directly into a vendor's proprietary network protocol for communicating with their DBMS. Allows client apps to communicate directly with their backend server.

JDBC/ODBC and Concerns for Mobile Computing While it is possible to use ODBC/JDBC to communicate with a DBMS from your iPhone/Android/Windows Phone device, it is not recommended. Why?: Bandwidth issues. Security-related issues. Lack of processing power on the client-side.