same columns ,multiple rows

Question

my table structure is given bellow

deptid  ename 

10      CLARK,KING,MILLER 

20      ADAMS,FORD,JONES,SCOTT,SMITH

but i want the output sould be like

deptid   ename  

10       CLARK   

         KING       

         MILLER 

------------------

20       ADAMS       

         FORD        

         JONES       

         SCOTT         

         SMITH

please tell me how to do it in sql