title: hive: Using collect_set with a delimiter
body: <p>I am trying to use collect_set in a hive query to group the columns on a group by condition. Each row is having spaces as delimiters instead of ',' or something. How to change the delimiter to ',' or any other delimiter in this case? </p>
  
  <p>Thanks in advance. </p>
  
  <p>Regards,
  Naga Vemprala </p>