title: how can I select this type(postgresql)?
body: <p>This is table's column. json type.</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>actions</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>[{&quot;action_type&quot;:&quot;page_engagement&quot;,&quot;value&quot;:&quot;4&quot;},{&quot;action_type&quot;:&quot;video_view&quot;,&quot;value&quot;:&quot;7&quot;}]</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>I'd like to select this column to convert like this.</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>page_engagement</th>
  <th>video_view</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>4</td>
  <td>7</td>
  </tr>
  </tbody>
  </table>
  </div>