DATABASE APPLICATION DEVELOPMENT SAK 3408 The Web and DBMS.

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Presentation transcript:

DATABASE APPLICATION DEVELOPMENT SAK 3408 The Web and DBMS

SAK3408 by PSS The Web as Database Application Platform  Providing users with an interface to one or more database.

SAK3408 by PSS Requirements for Web-DBMS Integration  The ability to access valuable information in a secure manner.  Data and vendor independent connectivity to allow freedom of choice in the selection of DBMS now and in the future.  The ability to interface to the database of any propriety web browser or web server.  A connectivity solution that takes advantage of all the features of an organization’s DBMS.  Acceptable performance.  Minimal administration overhead.  Support for transaction that spam multiple HTTP requests.  Support for session – and application based authetication.

SAK3408 by PSS Web-DBMS Architecture  Considering client-server architecture for DBMS Traditional two-tier architecture Three-tier architecture

SAK3408 by PSS Two-tier Application First Tier Second Tier Client Database Server Tasks User interface Main business and data processing logic Server-side validation Database access

SAK3408 by PSS Three-tier Application First Tier Second Tier Client Application Server Tasks User interface Business logic Data processing logic Third Tier Database Server Tasks Data validation Database access

SAK3408 by PSS Advantages of Web-DBMS  Simplicity  Platform independence  Graphical User Interface  Standardization  Cross platform support  Transparent network access  Scalable deployment  Innovation

SAK3408 by PSS Disadvantages of Web-DBMS  Reliability  Security  Cost  Scalability  Limited functional of HTML  Statelessness  Bandwidth  Performance  Immaturity of development tools

SAK3408 by PSS Scripting Languages  Scripting languages allows the creation of functions embedded within HTML code allowing various process to be automated and object to be accessed and manipulated.  Scripting engine seek to resolve the problem of having no functioning application code in the browser.  As the script code embedded in the HTML, it is downloaded every time the page is accessed.  Updating the page in the browser is simply a matter of changing the web document on the server.

SAK3408 by PSS Scripting Engine  JavaScript  VBScript  Per and PHP  JavaSever Pages  Active Server Pages  An so on…..