SQL & PL/SQL

Hi,

Can anyone ans my doubt which i had regarding null collection and collection variable initialized with empty constructor.

eg.

declare

type num_list is table of number;

lv_col1 num_list;

lv_col2 num_list:=num_list();

begin

null;

end;

my doubt is since both collection variables (lv_col1 and lv_col2) are null, what is the difference between them at server memory level.

Thanks,

Vipin Kumar Rai