PLS-00103:Encontrou o símbolo de fim de arquivo ao esperar um dos seguintes:;

DECLARE
 v_department egpl_department.department_name%type;
BEGIN 
  select department_name 
  into   v_department
  from   egpl_department 
  where  department_id in (select department_id from egpl_casemgmt_activity); 

  -- Do something useful with v_department
END;