It doesn't do anything besides indicating that the uniqueidentifier values in the column uniquely identify rows in the table. The uniqueness must be enforced through other mechanisms, such as the PRIMARY KEY or UNIQUE KEY constraints for the column.
It's primarily used by SQL Server replication. In SQL 2008 it's also required by the new FILESTREAM feature.
>If I set the Row Guid Column property for my PK to True as it is a UID, what does this actually do? It looks like the property for Default Value on the column also got set to newid() so that must have been related and the point of it.
>Thanks
>Tim
>As you can tell, I am not so savy about SQL Server
--sb--