You can fetch all customers with the same name and navigate in the resulting dataset:

SELECT CustID, LastName, FirstName
   FROM Customers
   WHERE LastName = <lastname> and FirstName = <firstname>
   ORDER BY LastName, FirstName

HTH

>The customer table of my SQL server database contains the following 3 column. There may be more than one customer having exactly the same last and first names while CustID is unique:
>CustID, LastName, FirstName
>
>Data currently showing in my "Customer Data" form are
>CustID=671
>LastName='Barnes'
>FirstName='John'
>
>What is the best SQL command to get the CustID of next (alphabetic order) customer?