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<h1 class="topictitle1">Introduction to distributed database programming</h1>
<div><p>Distributed relational database support on the <span class="keyword">iSeries™ server</span> consists
of an implementation of IBM<sup>®</sup> Distributed Relational
Database Architecture™ (DRDA<sup>®</sup>) and integration of other SQL clients by use of
Application Requester Driver (ARD) programs.</p>
<p><span class="keyword">i5/OS™</span> and the <span class="keyword">DB2 Universal Database™ for iSeries</span> Query Manager and SQL Development
Kit combine to provide this support.</p>
<p>This topic describes distributed relational database and how it is used
on the <span class="keyword">iSeries server</span>. </p>
<p>In addition, an example distributed relational database called Spiffy Corporation
is described. This fictional company uses the <span class="keyword">iSeries server</span> in
a distributed relational database application program. This sample of the
Spiffy Corporation forms the background for all examples used in this topic.</p>
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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="rbal1drdbp.htm">Distributed relational database processing</a></strong><br />
A <dfn class="term">relational database</dfn> is a set of data stored in one
or more tables in a computer. </li>
<li class="ulchildlink"><strong><a href="rbal1archsupp.htm">Distributed relational database architecture support</a></strong><br />
DRDA support
for distributed relational database processing is used by IBM relational
database products. DRDA support defines protocols for communication between
an application program and a remote relational database.</li>
<li class="ulchildlink"><strong><a href="rbal1drdacdra.htm">DRDA and CDRA support</a></strong><br />
One of the interesting possibilities in a distributed relational
database is that the database might not only span different types of computers,
but those computers might be in different countries or regions. The same servers,
such as <span class="keyword">iSeries server</span>s, can encode
data differently depending on the language used on the server.</li>
<li class="ulchildlink"><strong><a href="rbal1appreq.htm">Application requester driver programs</a></strong><br />
An <dfn class="term">application requester driver</dfn> (ARD) program is a
type of exit program that enables SQL applications to access data managed
by a database management system other than <span class="keyword">DB2 Universal Database for iSeries</span>. </li>
<li class="ulchildlink"><strong><a href="rbal1drdh.htm">Distributed relational database on i5/OS</a></strong><br />
DB2
Universal Database™ for <span class="keyword">i5/OS</span> provides
all the database management functions for <span class="keyword">i5/OS</span>.
Distributed relational database support on the system is an integral part
of the operating system, just as is support for communications, work management,
security functions and other functions.</li>
<li class="ulchildlink"><strong><a href="rbal1mandd.htm">Manage an iSeries distributed relational database</a></strong><br />
Managing a distributed relational database on the <span class="keyword">iSeries server</span> requires
broad knowledge of the resources and tools within the <span class="keyword">i5/OS</span> licensed program.</li>
<li class="ulchildlink"><strong><a href="rbal1spifx1.htm">Example: Spiffy Corporation distributed relational database</a></strong><br />
The Spiffy Corporation is used in several IBM manuals to describe distributed relational
database support. In this topic collection, this fictional company has been
changed somewhat to illustrate <span class="keyword">iSeries server</span> support
for DRDA in
an <span class="keyword">iSeries server</span> network.</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rbal1kickoff.htm" title="Distributed database programming describes the distributed relational database management portion of the i5/OS licensed program. Distributed relational database management provides applications with access to data that is external to the applications and typically located across a network of computers.">Distributed database programming</a></div>
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