title: SQL - select the most frequency item
body: <p>Suppose I have the table as below:</p>
  
  <pre><code>id | name
  ----------
  01 | Tony
  02 | Peter
  03 | Tony
  04 | Tony
  05 | John
  .. | ..
  99 | David
  </code></pre>
  
  <p>How can I use SQL statement to get the most frequency of the field name(Tony)?</p>