I think you don't talk about 10 billion digits, but 11. So there are several choices of field types. Bigint, money, numeric, double, float. In the latter types you can specify an overall width and precision.
What do you store in that value range? Integer data?
In conjunction with what client side frontend software do you use SQL Server?
What is your problem with the choice of the data type?
Bye, Olaf.