how to assign roster to bulk employee

 

   Dear,

    1-  Roster1

     2- Roster2

   We are facing the problem while assigning roster around more than 100 employee, Is there any way to assigne roster through dataloader/api or any othere workaround Because there are so difficult to attache roster with individual employee which is too time consuming activity.

    Seconldy, have any option provided by oracle throug we can set any of the above two roster as defaul which autamoticall to be attached while employee creation.

  

   thanks.