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      <h1>SQL Reference - Functions</h1>
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      <h2>SUBSTRING</h2>
      <p>The SUBSTRING function returns a new character string that is a substring 
        of another string. The new string begins at the specified starting point 
        in the original string (string1) and extends the number of characters 
        specified in the length parameter. If the length parameter is omitted, 
        the new string extends to the end of the original string. </p>
      <p>The return datatype is C STRING.</p>
      <p class="line">&nbsp;</p>
      <h3><a name="syntax"></a>Syntax</h3>
      <p class="ex">SUBSTRING(string1 FROM start [FOR length]))</p>
      <p class="indent">SUBSTRING<br>
        Required.</p>
      <p class="indent">string1<br>
        Required. This is the string that contains the characters that will be 
        returned.</p>
      <p class="indent">FROM<br>
        The FROM keyword is required.</p>
      <p class="indent">start<br>
        Required. start is an integer indicating the position of the first character 
        relative to 1 that will be returned.</p>
      <p class="indent">FOR length<br>
        Optional. This indicates the number of characters after and including 
        the start character, that will be returned. If omitted, all of the remaining 
        characters after and including the start character will be returned.</p>
      <p class="line">&nbsp;</p>
      <h3><a name="Example"></a>Example</h3>
      <p class="ex">SUBSTRING(PRODUCTS.PRODUCT_NO FROM 2 FOR 3)</p>
      <p>The character position index begins with 1. If the product_no is ASUP93541, 
        the above example would return SUP.</p>
      <p class="ex"><br>
        select product_no,<br>
        <strong>SUBSTRING(PRODUCTS.PRODUCT_NO FROM 2 FOR 3) as Sub1, <br>
        SUBSTRING(PRODUCTS.PRODUCT_NO FROM 5) as Sub2<br>
        </strong>from products</p>
      <table width="75%" border="0" cellspacing="0" cellpadding="0">
        <tr> 
          <td><p class="ex">Product_No</p></td>
          <td><p class="ex">Sub1</p></td>
          <td><p class="ex">Sub2</p></td>
        </tr>
        <tr> 
          <td><p class="ex">ASUP93541</p></td>
          <td><p class="ex">SUP</p></td>
          <td><p class="ex">93541</p></td>
        </tr>
        <tr> 
          <td><p class="ex">BPRI54687</p></td>
          <td><p class="ex">PRI</p></td>
          <td><p class="ex">54687</p></td>
        </tr>
      </table>
      <p class="ex">&nbsp; </p>
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