>>>10: PACK is too often used in situations where any benefit it provides is far outweighted by the costs associated with it.

>>I don't understand. Could you explain?

>There are many posts on the MS newsgroups where the poster wants to use PACK as a way to insure unique keys when invoice numbers (or whatever) are re-used.
>Craig is forever putting "See the article on my website about primary keys."

Are people really doing this, youch! Dangerous.