I would use SQL to change the data in the database first, and
then fill the dataset.
Alternatively, when you fill the dataset, set up your SQL to concatenate that specific number to the database's information as it is being retrieved. To append a 1 to all FNames from an Oracle DB you might use something like:
Code:
SELECT FNAME||'1' NEWNAME, LNAME
FROM EMPLOYEES
ORDER BY LNAME
(â||â is the concatenation operator for Oracle.)