title: Return 'something' instead of null
body: <p>I have this code:</p>
  
  <pre><code>select f.name
  from Firms F
  where
  f.id = @{_firmID}
  </code></pre>
  
  <p>Code select name of firm by inserted ID. But if I insert bad ID (nonexisting ID), table return null. I need to rewrite this code to return 'wrong ID' if id not exist for example.
  How can I achieve this? Thanks for all reply</p>