title: how to get the list of default users in Oracle 11g
body: <p>is there an sql query which extract the default users ?
  i tried :</p>
  
  <blockquote>
    <p>describe DBA_USERS</p>
  </blockquote>
  
  <p>but i didn't find any column which indicate that the user is a default user or not !</p>