COUNT(*) Includes Null Values? : <p><a href="https://msdn.microsoft.com/en-us/library/ms175997.aspx" rel="noreferrer">MSDN</a> documentation states:</p>

<blockquote>
  <p>COUNT(*) returns the number of items in a group. This includes NULL
  values and duplicates.</p>
</blockquote>

<p>How can you have a null value in a group? Can anyone explain the point they're trying to make?</p>
