title: Update field with Regular Expression (or similar)
body: <p>So there's a field in my table called Url wich looks like this:
  <code>/MyServer/MyPage?Param=XXX</code>.<br>
  I need to run a script in order to update that field from <code>XXX</code> to say <code>YYY</code>. I do have the rules on what <code>YYY</code> corresponds to what <code>XXX</code>, the thing is that I don't know how to update ONLY the fields whose param is exaclty <code>Param</code> and no other.</p>
  
  <p>So these would be the updates:  </p>
  
  <pre><code>/MyServer/MyPage?Param=XXX        ==&gt;  /MyServer/MyPage?Param=XXX  
  /MyServer/MyOtherPage?Param=AAA   ==&gt;  /MyServer/MyOtherPage?Param=BBB
  /MyServer/MyOtherPage?Param2=JJJ  ==&gt;  /MyServer/MyOtherPage?Param2=JJJ 
                                         (last row no changes since it is not param)
  </code></pre>
  
  <p>Have I made myself clear?</p>
  
  <p><strong>Edit:</strong> I have a aux table with the correpsondation <code>XXX</code> <code>YYY</code>. Keep in mind <code>XXX</code> is just an example. Actually the parameter is an integer so the length of the param value is variable</p>