title: how to insert data to table using update statement mysqli
body: <p>I need to update a column in my DB, but keeping the existing records and adding to the record more data. I am using the following, but it is not working:</p>
  
  <pre><code>$mysqli-&gt;query('UPDATE products SET imagen =  imagen + \''.$imi.'\' WHERE id = \''.$id.'\'');
  </code></pre>
  
  <p><code>$imi</code> will be abc.</p>