title: How to remove duplicate records from same table while displaying
body: <p>I am having table DEMO</p>
  
  <pre>
  CUST_ID    DATE_ENQ
  ---------- ---------
  30         28-APR-14 
  31         27-APR-14 
  30         27-APR-14 
  </pre>
  
  <p>I want output something like this</p>
  
  <pre>
  COUNT(CUST_ID) DATE_ENQ
  -------------- ---------
               2 27-APR-14 
               1 28-APR-14 
  
  </pre>