title: SQL query, count and group by
body: <p>If I have data like this:</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>Key</th>
  <th>Name</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>1</td>
  <td>Dan</td>
  </tr>
  <tr>
  <td>2</td>
  <td>Tom</td>
  </tr>
  <tr>
  <td>3</td>
  <td>Jon</td>
  </tr>
  <tr>
  <td>4</td>
  <td>Tom</td>
  </tr>
  <tr>
  <td>5</td>
  <td>Sam</td>
  </tr>
  <tr>
  <td>6</td>
  <td>Dan</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>What is the SQL query to bring back the records where <code>Name</code> is repeated 2 or more times?</p>
  <p>So the result I would want is</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>Tom</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>Dan</td>
  </tr>
  </tbody>
  </table>
  </div>