http://cs.completit.com/communityserver/blogs/idragoev/archive/2007/07/04/how-to-select-the-primary-key-data-type.aspxWhen a new database is about to be designed, have to think about what data type to use for the primary keys. There are several things that should be taken into consideration: the average database size expected, the possibility of growing in the future,enCommunityServer 2.1 SP2 (Build: 61129.2)