Database Reference
In-Depth Information
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<TITLE> Data Warehousing Fundamentals: A Comprehensive Guide for IT Professionals </ TITLE>
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<H2> Welcome to the Home Page of our data warehousing textbook. Review the table of contents. Look at the sample chapters. Get
a complete inside into the unique presentation. Above all, get practical and useful knowledge that can propel your career into new
heights. For further information, please contact John Wiley & Sons, world-renowned publisher of superb technical topics. <BR>
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http://wiley.com /dw001/book /toc.html
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http://wiley.com/dw001/book/c
hapter 1.html”>1. The Compelling Need for Data Warehousing <BR>
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http://wiley.com/dw001/book /c
hapter 2.html”>2. Data Warehouse: The Building Blocks<BR>
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http://wiley.com/dw001/book /c
hapter 3.html”>3. Trends in Data Warehousing<BR>
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http://wiley.com/dw001/book /c
hapter 4.html”>4. Planning and Project Management<BR>
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Figure 19-3
Sample HTML coding.
Graphic Elements
All modern browsers display in-line graphics embedded in an
HTML page. The source of the image is indicated by the term “SRC” in the coding
for the graphic element. Browsers not capable of handling graphics will display a
text string based on the “ALT” attribute.
Example:
<IMG SRC=”ABCD.logo.gif” ALT=”ABCD Logo”>ABCD Company
Figure 19-3 shows a sample coding for an HTML document. Note how the
various elements are combined to create the document.
Static and Dynamic Web Pages
An HTML document is stored in a file on the
server and displayed by the browser. Every time you request for the web page, you
will see the same information. The content of the page stays intact; it does not
change. If the information on a particular web page must be changed, then the doc-
ument must be recoded and the revised version must be stored in the file on the
server. Such web pages are static web pages.
When HTML was first introduced, its features included text and graphics as well
as the embedding of hypertext links. This itself was a dramatic achievement for dis-
tributing and presenting information over the Internet. Even though the web pages
were static, HTML revolutionized the use of the Internet. However, as the use of
the Web expanded, the limitations of static web pages became apparent. Users want
exchange of information to be interactive. Users need the ability of servers to
respond to user inputs and produce web pages according to the inputs. Users need
dynamic web pages.
A dynamic web page changes every time it is accessed. Dynamic HTML is a term
applied to a collection of technologies that make HTML documents more dynamic
and interactive. In addition to having the standard features of a static web page, a
dynamic web page can return the results of a database query. For example, you can
complete a form and send it as an input to the server. The server must then return
results based on your input. Furthermore, a dynamic web page may be customized
on the basis of user preferences.
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