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    <td align="right" class="bar"> <!-- InstanceBeginEditable name="Section Title" -->
      <h1>SQL Reference</h1>
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      <p>Syntax</p>
      <p><a href="SELECT%20List.htm">SELECT List</a></p>
      <p><a href="FROM%20Clause.htm">FROM</a></p>
      <p><a href="WHERE%20Clause.htm">WHERE</a></p>
      <p><a href="GROUP%20BY%20Clause.htm">GROUP BY / HAVING</a></p>
      <p><a href="ORDER%20BY%20Clause.htm">ORDER BY</a></p>
      <p><a href="Criteria%20Conditioning.htm">Criteria Conditioning</a></p>
      <p class="line">&nbsp;</p>
      <p><a href="../SQL%20Reference.htm">SQL Reference</a></p>
      <p><a href="../Joins.htm">Joins</a></p>
      <p><a href="../Nested%20Queries.htm">Nested Queries</a></p>
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      <p><a href="../ON%20CURSOR%20ON%20INSTANCE.htm">ON CURSOR | INSTANCE</a></p>
      <p><a href="../WITH%20Options.htm">WITH Options</a></p>
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      <h2>SELECT Statement Syntax</h2>
      <p>Omnidex supports most of the SQL 2 standard syntax along with some Omnidex 
        specific extensions. This section discusses exactly what is supported 
        in each part of the select statement.</p>
      <p><a href="#selectlist"><img src="../../images/arrow2.gif" width="10" height="10" hspace="5" border="0">SELECT 
        select_items</a></p>
      <p><a href="#from"><img src="../../images/arrow2.gif" width="10" height="10" hspace="5" border="0">FROM 
        from-clause</a></p>
      <p><a href="#where"><img src="../../images/arrow2.gif" width="10" height="10" hspace="5" border="0">[WHERE 
        criteria]</a></p>
      <p><a href="#groupby"><img src="../../images/arrow2.gif" width="10" height="10" hspace="5" border="0">[GROUP 
        BY grouping_items</a></p>
      <p><a href="#having"><img src="../../images/arrow2.gif" width="10" height="10" hspace="15" border="0">[HAVING 
        having_clause]]</a></p>
      <p><a href="#orderby"><img src="../../images/arrow2.gif" width="10" height="10" hspace="5" border="0">ORDER 
        BY sort_items</a></p>
      <p class="line">&nbsp;</p>
      <h3><a name="selectlist"></a>SELECT select_items</h3>
      <p>Examples</p>
      <p>Select_items can be any of the following. Multiple select_items are comma 
        separated.</p>
      <ul>
        <li>Distinct </li>
        <li>Result set limiters </li>
        <li>Column name(s) </li>
        <li>Column name(s) with an alias. </li>
        <li>Table-qualified column name(s) </li>
        <li>Table-alias qualified column name(s) </li>
        <li>Aggregate Functions </li>
        <li>SQL92-Compliant Functions </li>
        <li>Omnidex Extended Functions </li>
        <li>Literals </li>
        <li>Expressions </li>
        <li>$ROWID, $ODXID</li>
      </ul>
      <p class="line">&nbsp;</p>
      <h3><a name="from"></a>FROM Clause</h3>
      <p>Example</p>
      <p>The FROM clause can contain any of the following:</p>
      <ul>
        <li>Single Table </li>
        <li>Multiple Tables (Joins) </li>
        <li>Join columns must have matching data types and lengths </li>
        <ul>
          <li>Inner Joins (Standard SQL Syntax) - Join occurs in the WHERE clause 
          </li>
          <li>Outer Joins (Standard SQL Syntax) - Left Outer Join or Right Outer 
            Join </li>
        </ul>
        <li>Nested Select </li>
      </ul>
      <p class="line">&nbsp;</p>
      <h3><a name="where"></a>WHERE Clause</h3>
      <p>Example</p>
      <h6>WHERE clause criteria can contain any of the following:</h6>
      <ul>
        <li>left_operand = right_operand (equal to) </li>
        <li>left_operand &lt; right_operand (less than) </li>
        <li>left_operand &gt; right_operand (greater than) </li>
        <li>left_operand &lt;= right_operand (less than or equal to) </li>
        <li>left_operand &gt;= right_operand (greater than or equal to) </li>
        <li>left_operand &lt;&gt; right_operand (not equal to) </li>
        <li>left_operand != right_operand (not equal to) </li>
        <li>left_operand in (value-list) </li>
        <li>left_operand like right_operand_with_wildcard </li>
        <li>exists (Nested Select) - MUST RETURN ONLY ONE COLUMN. </li>
        <li>=, &lt;, &gt;, &lt;=, &gt;=, &lt;&gt;, like - Nested Select that GUARANTEES 
          to return ONLY ONE ROW. MUST RETURN ONLY ONE COLUMN. </li>
        <li>in (Nested Select) - Can return 0 or more rows. MUST RETURN ONLY ONE 
          COLUMN. </li>
        <li>NOT, AND, OR with any of the above</li>
      </ul>
      <h6>left_operand and right_operand can contain any of the following:</h6>
      <ul>
        <li>Columns </li>
        <li>Table Qualified Columns - table.column </li>
        <li>Column alias </li>
        <li>Literals </li>
        <li>Constants </li>
        <li>Expressions </li>
        <li>$VALUES, $ROWID, $ODXID </li>
        <li>IS NULL - This will not be an optimized query! </li>
      </ul>
      <p>Use parenthesis to force order of precedence.</p>
      <p class="line">&nbsp;</p>
      <h3><a name="groupby"></a>GROUP BY Clause</h3>
      <p>Example</p>
      <p>A GROUP BY clause can contain any of the following:</p>
      <ul>
        <li>Column names from select list </li>
        <li>Column names not in select list </li>
        <li><a name="having"></a>HAVING Clause</li>
        <ul>
          <li>A HAVING Clause can contain any of the following:</li>
          <li>Column Value Criteria </li>
          <li>Column Value Aggregations </li>
          <li>Nested Selects </li>
        </ul>
      </ul>
      <p class="line">&nbsp;</p>
      <h3><a name="orderby"></a>ORDER BY Clause</h3>
      <p>Example</p>
      <p> An ORDER BY clause can contain any of the following:</p>
      <ul>
        <li>Column Name(s) - Comma separated </li>
        <li>Column Alias - Comma separated - Must be in select item list </li>
        <li>Select List Item Ordinal Numbers - Comma separate - In order of select 
          item list starting from 1 </li>
        <li>Aggregates, Functions, Expressions - Must be in select item list - 
          Must be referred to ordinally (select list item number) - Comma separated 
        </li>
        <li>ASC (default) or DESC - With any of the above. DESC sorts will not 
          be optimized. <br>
        </li>
      </ul>
      <p></p>
      <p>&nbsp;</p>
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