[AccessD] Primary Key Best Practices

To get banal, lets consider a dataset that consists of one and only one 
column "NumberOfItemsOrdered". It has, as of this moments snapshot, 234867 
rows:
1
4
87
8734
(null)
1
34
six
224
...
1

Of what possible use it this? Where are the problems? Why are we debating 
this?




-- 
regards

Bruce