title: MySQL append string
body: <p>How can I append a string to the end of an existing table value? Let's say I have the table below:<br/><br/>
  <img src="https://i.stack.imgur.com/hHsh2.png" alt="enter image description here">
  <br/><br/>
  And let's say that Maria Anders not only lived in Berlin but also Tokyo. How would I append the string <br/>" Tokyo" onto the City column where ContactName = Maria Anders?
  <br/><br/>
  P.S. I want to be able to append on to a null value as well. Thus ending up with just the one city.</p>