title: SQL report returns dash when there is no match
body: <p>I have a list of branches and when there is no branch the result is returned as a dash. I've tried doing a case when like so:</p>
  
  <pre><code>CASE Table.column
  WHEN '-' THEN 'Global'
  ELSE Table.column
  END
  </code></pre>
  
  <p>This does nothing. I tried:</p>
  
  <pre><code>CASE Table.column
  WHEN NULL THEN 'Global
  ELSE Table.column
  END
  </code></pre>
  
  <p>This also did nothing. Any thoughts? The table that the branch data comes from has no row with a dash in it.</p>
  
  <p>Thanks guys.</p>