title: How to Update a MySQL DATETIME to NOW()? (Error 1064)
body: <p>I am encountering the MySQL <code>error 1064</code> trying to update the <code>datetime</code> column <code>exit</code>.</p>
  <pre><code>UPDATE history SET
  exit = NOW()
  WHERE city = 'Paris'
  </code></pre>
  <p>I don't understand why it occurs.</p>