title: DAYS and DATE clause in DB2
body: <p>I am wondering if someone could explain this line of code of DB2 in Java, especially the function of DAYS clause since typically I saw it being used like DAYS(xxx):</p>
  
  <pre><code>dd.actual_date between DATE('"+startDate+"') - "+noDays+" DAYS AND DATE('"+startDate+"')
  </code></pre>
  
  <p>Thanks,
  Eric</p>