text: -- Lay danh sach cac hang xe chua co Moderator
  --
  -- usp_getAvailableOperator
  
  Create Procedure usp_getAvailableOperator
  As
  Begin
  	Select hx.MaHangXe, hx.TenHangXe
  	From (	Select MaHangXe
  			From HangXe
  			Except
  			Select HangXe From QuanTriVien) As HangXeMoi
  		Join HangXe hx on HangXeMoi.MaHangXe = hx.MaHangXe
  End