title: how to display number value in words
body: <p>Q. Display the number value in Words and output should look like this</p>
  
  <pre><code>SAL        In_Words
  --------- -----------------------------------------------------
  800       eight hundred
  1600      one thousand six hundred
  1250      one thousand two hundred fifty
  </code></pre>
  
  <p>And, I'm still didn't figure out, how this query is the solution for the above output.</p>
  
  <pre><code>select sal, to_char(to_date(sal,'j'),'Jsp') in_words from emp
  </code></pre>
  
  <p>What <code>to_date</code> is doing here ? Anyone have any idea about this query ? </p>