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      <h1>Database Platforms</h1>
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      <p><a href="#pk">Primary Keys</a></p>
      <p><a href="#start">Getting Started with SQL Server</a></p>
      <p>&nbsp;</p>
      <p class="line">&nbsp;</p>
      <p>&nbsp;</p>
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      <h2>SQL Server</h2>
      <p>Omnidex can communicate with SQL Server via the Omnidex ODBC Gateway 
        Interface. However, this DOES NOT limit you to ODBC applications. It is 
        simply how Omnidex will communicate with SQL Server. You can also develop 
        JDBC and OmniAccess API applications against a SQL Server database.</p>
      <p><img src="../../images/note.gif" width="12" height="15">Since ODBC is 
        a Windows only component, the client machine must have the Windows operating 
        system. </p>
      <p class="line">&nbsp;</p>
      <h3><a name="pk"></a>Primary Keys</h3>
      <p>Parent tables are usually defined with a primary key, a column that uniquely 
        identifies a row, but SQL Server does not require it. However, Omnidex 
        does require a unique rowid on all parent tables. </p>
      <p>A native rowid can be any data type up to 64 bytes, must be unique and 
        natively indexed. If a parent table does not have a column that meets 
        this criteria, you must use a <a href="../../Omnidex%20Concepts/Features/Redefined%20Rowids.htm">redefined 
        rowid</a>.</p>
      <p class="line">&nbsp;</p>
      <h3><a name="start"></a>Getting Started with SQL Server</h3>
      <p>To install Omnidex against an existing SQL Server database, follow these 
        steps.</p>
      <ul>
        <li><a href="#envvar">Set the Environment Variables</a> </li>
        <li><a href="#dsn">Create an ODBC Data Source</a> to connect to the SQL 
          Server database</li>
        <li><a href="Create%20an%20Environment%20Catalog.htm">Create an Omnidex 
          Environment Catalog</a></li>
        <li><a href="Design%20and%20Install%20the%20Indexes.htm">Design and Install the indexes</a></li>
        <li>Create an Omnidex ODBC Data Source</li>
      </ul>
      <p>The examples shown in these setup steps are done against the ORDERS sample 
        database.</p>
      <p class="line">&nbsp;</p>
      <h3><a name="envvar"></a>Set the Environment Variables</h3>
      <p> The first step that should always be completed before working with any 
        Omnidex tools or applications, is to make sure the <a href="../../Appendix/Environment%20Variables.htm" target="showme">environment 
        variables</a> are set. </p>
      <p>The Omnidex server software installation script for Windows should have 
        set the required variables on the system. However, it is a good idea to 
        verify these variables anyway, just in case.</p>
      <p>This can be done in a couple of ways. The quickest way is to open a console 
        window (DOS) and enter &quot;SET&quot; at the command prompt. This will 
        display a complete list of the current environment variable settings. 
        Look for the <a href="../../Appendix/Environment%20Variables.htm" target="showme">required 
        environment variables</a> in the list.</p>
      <p>Another way to check the environment variable settings is to right click 
        on the &quot;My Computer&quot; link, select &quot;Properties&quot; from 
        the pop up menu, click on the &quot;Advanced Tab&quot;, then click the 
        &quot;Environment Variables&quot; button (at the bottom). <a href="envvar.jpg" target="showme"><img src="../../images/showme.gif" alt="Show Me" width="71" height="18" border="0" align="right"></a>This 
        will display a list of environment variables for the User and the System. 
        The variables can also be set in this window. </p>
      <p class="line">&nbsp;</p>
      <h3><a name="dsn"></a>Create an ODBC Data Source</h3>
      <p>At this point in the setup, Omnidex is unaware of the existence of the 
        SQL Server database. Therefore, this initial connection will be made through 
        an ODBC data source. </p>
      <p><img src="../../images/note.gif" width="12" height="15">This data source 
        is a Windows ODBC data source, NOT an Omnidex data source. You will use 
        an Omnidex data source later, after the environment file has been compiled 
        and the indexes installed.</p>
      <p>Create an ODBC data source using the Windows ODBC Administration tool. 
        Use the SQL Server driver. Login security will depend on the SQL Server 
        setup. Ask the database administrator for information about login security. 
      </p>
      <p>On Windows 2000 and XP, the ODBC Administration tool can be found in 
        the Control Panel/Administrative Tools area labeled Data Sources (ODBC). 
        <a href="admintools.jpg" target="showme"><img src="../../images/showme.gif" alt="Show Me" width="71" height="18" border="0"></a>.</p>
      <p>This data source can be a User, System, or File DSN. One type is not 
        better than any other, as far as <a href="../../Utilities/OAHELPER/OAHELPER.htm">OAHELPER</a> 
        is concerned. However, the entry in OAHELPER will vary slightly depending 
        on which data source type is used. This is explained in the next step, 
        &quot;Create an Environment Source File&quot;.</p>
      <p>Create the data source according to the database administrator specifications. 
        Be sure to test the connection before proceeding.<br>
      </p>
      <p>&nbsp;</p>
      <p>&nbsp;</p>
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