title: MySQL: counting null values from a query
body: <p>I've a query like:</p>
  
  <pre><code>SELECT * FROM table WHERE id = 1
  </code></pre>
  
  <p>The result is <code>YES | null | null | NO | null</code> and so more.</p>
  
  <p>I would like to know how many NULL values I get, there 3. Without telling every column names, if possible.</p>
  
  <p>Any tip for that?</p>