I tend to be with Sean. I'd do this:

Table1

ID INT

more columns

Table2

ID INT

FKID INT

where I'd name the FKID something that makes sense.

Or more formally:

Create table Customers (

CustomerID int

, CustomerName Varchar(20)

)

;

Create table Orders (

OrderID int

, CustomerID int

, OrderDate datetime

)

;