title: WHERE all IS NOT NULL
body: <p>How can I run a MySQL query that selects everything that is not null? It would be something like</p>
  
  <pre><code>SELECT * FROM schedule WHERE ((all)) IS NOT NULL
  </code></pre>
  
  <p>Do I just remove the all and go..?</p>
  
  <pre><code>SELECT * FROM schedule WHERE IS NOT NULL
  </code></pre>