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      <h1>SQL Reference - Commands</h1>
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      <p><a href="#syntax">Syntax</a></p>
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      <h2>ATTACH</h2>
      <p>ATTACH is used to attach an Omnidex Standalone Table (OST) file. This 
        table will then be made available for manipulation the same as any other 
        table in the environment, for the duration of the Omnidex application 
        or until it is detached.</p>
      <p>OST's are created using the Omnidex EXPORT statement.</p>
      <p class="ex">export company, contact, state, status from customers, orders 
        where customers.customer_no=orders.customer_no and status='cncl' to cncl.ost 
        with ost</p>
      <p class="ex">attach ost cncl.ost as CANCELED</p>
      <p class="ex">select company, contact from customers where state='CO'</p>
      <p>Because Omnidex indexes are not installed on the OST, queries are performed 
        by a serial read.</p>
      <p>Detach the attached OST from the open environment using the <a href="DETACH.htm">DETACH</a> 
        command.</p>
      <p class="line">&nbsp;</p>
      <h3><a name="syntax"></a>Syntax</h3>
      <p class="ex">ATTACH OST filespec AS table [ON [INSTANCE] instance][WITH 
        options]</p>
      <p class="indent">ATTACH OST<br>
        Required </p>
      <p class="indent">filespec<br>
        Required - The filespec of the OST file to be attached. The .ost file 
        extension is optional.</p>
      <p class="indent">AS table<br>
        Required - Assign a table name to the OST as it will be referred to in 
        all subsequent queries.</p>
      <p class="indent">[ON [INSTANCE] instance] <br>
        Optional - Specify which instance the OST will be assigned to. Default 
        is the current instance. The &quot;INSTANCE&quot; keyword is optional.</p>
      <p class="indent">[WITH options] <br>
        Optional - Specify options to be used for this command.</p>
      <p class="line">&nbsp;</p>
      <h3><a name="options"></a>Options</h3>
      <p>&nbsp;</p>
      <p class="line">&nbsp;</p>
      <h3><a name="example"></a>Example</h3>
      <p>This example creates an OST that contains customers who have canceled 
        their order. Then customers whose orders are on back order, are added 
        to the OST.</p>
      <p class="ex">&gt;export company, contact, state, status from customers, 
        orders where customers.customer_no=orders.customer_no and status='cncl' 
        to cncl.ost with ost<br>
        79 rows exported to cncl.ost</p>
      <p class="ex">&gt;attach ost /users/test/cncl as CANCELED</p>
      <p class="ex">&gt;export company, contact, state, status from customers, 
        orders where customers.customer_no=orders.customer_no and status='back' 
        to cncl with ost, append<br>
        621 rows exported to cncl.ost</p>
      <p class="ex">&gt;select company, contact from customers where state='CO'<br>
        ...</p>
      <p class="ex">22 rows returned</p>
      <p class="ex">&gt;detach ost canceled</p>
      <p class="ex">table CANCELED detached</p>
      <p>&nbsp;</p>
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