title: how to calculate only days between two dates in postgres sql query .
body: <p>Suppose I have given two dates, if difference is one month then it should be display as 30 days.Even months also need to convert into days
  I have tried  with age( date,now()::timestamp without time zone) but it is giving months-dates-years format. ex: 10 mons 24 days 13:57:40.5265.But I need following way.
  For example if two months difference is there then I need output as 60 days.</p>