title: using stuff for fullname when task is same for two person even though fullname is not separating with comma
body: <pre><code>SELECT DISTINCT  
  
  STUFF((SELECT distinct ', ' + U1.FullName
       from TM_user U1
       where u.TM_UserID=U1.TM_UserID
  
          FOR XML PATH ('')
     ), 1, 2, '') FullName,
  
  task_name
  FROM project  JOIN task 
                 ON project.project_id=task.project_id
            JOIN timesheet  
                 ON timesheet.task_id=task.task_id
            JOIN Team 
                 ON project.project_id = Team.project_id
            JOIN TM_user u 
                 ON u.TM_userID=timesheet.user_id
  
  WHERE u.Is_Active=1 
  and
  u.report_to=13 
  AND 
  worked_dte BETWEEN '2014-03-18' AND '2014-03-21'
  </code></pre>
  
  <p>output i am getting </p>
  
  <pre>
  FullName                         task_name
  Chandu Devathi                       new task 2222
  Chandu Devathi                       TESST ePROM copy
  Chandu Devathi                       Testing plz ignore.
  Harish Kumar Ramakrishnappa      TESST ePROM copy
  </pre>
  
  <p>excepted output</p>
  
  <pre>
  FullName                                                   task_name
  Chandu Devathi                                                 new task 2222
  Chandu Devathi,Harish Kumar Ramakrishnapp                     TESST ePROM copy
  Chandu Devathi                                                Testing plz ignore.
  </pre>