title: split firstname and lastname but only on first space
body: <p>I'm trying to split a string in MSSQL by only the first whitespace
  Considering here can have 2 spaces in their full name, I have no idea how to do this.</p>
  
  <p>Example:</p>
  
  <p><code>Henk de Vries</code></p>
  
  <p>I would like to split it into:</p>
  
  <pre><code>Firstname: Henk
  Lastname: de Vries
  </code></pre>