title: Update a Table Field to its Value Plus a Constant on MYSQL w/o PHP
body: <p>I would like to perform an <code>UPDATE</code> in <code>MYSQL</code> in which I take a field value, add a constant and save the new value in the same field.</p>
  
  <p>Let's assume that we have a column called <code>OldValue</code> in a table called <code>aTable</code>.</p>
  
  <p>Pseudocode could be:</p>
  
  <pre><code>UPDATE aTable SET OldValue = OldValue + 220 WHERE someField = someValue
  </code></pre>
  
  <p>Do you have any idea on how I could do that? I would like to use a single query (on some administration panel) without making a <code>php</code> script.  (Of course, in that case the answer is quite simple.)</p>