Hi, I'm building nested tree and I need to get data for the next row in cursor, using Oracle. And I still need current row, so looping forward is not a solution. Example:

  OPEN emp_cv FOR sql_stmt;
  LOOP
  FETCH emp_cv INTO v_rcod,v_rname,v_level;
  EXIT WHEN emp_cv%NOTFOUND; 
  /*here lies the code for getting v_next_level*/
      if v_next_level > v_level then
          /*code here*/
          elsif v_next_level < v_level then
          /*code here*/
          else
          /*code here*/
          end if;
  END LOOP;
  CLOSE emp_cv;