title: get common data by combining data of three differrent sql query
body: <pre><code>SELECT STATNO FROM ENQUIRY  WHERE ID=12;
  </code></pre>
  
  <p>Returns: 100,102,110</p>
  
  <pre><code>SELECT STATNO FROM ENQUIRY  WHERE ID=16;
  </code></pre>
  
  <p>Returns: 102,112,118</p>
  
  <pre><code> SELECT STATNO FROM ENQUIRY  WHERE ID=21;
  </code></pre>
  
  <p>Returns: 101,102,120</p>
  
  <p>I need a query that combines the above and returns the common data: 102.</p>