title: What does "foo" mean in this SQL Server Query?
body: <p>for eg...</p>
  
  <pre><code>SELECT * 
    FROM ( SELECT RANK() OVER (ORDER BY stud_mark DESC) AS ranking,
                  stud_id, 
                  stud_name, 
                  stud_mark 
             FROM tbl_student ) AS foo 
   WHERE ranking = 10
  </code></pre>
  
  <p>Here <code>foo</code> is present...actually what it does ?..</p>