Writing to a file from Database

Hi,

I am writing data from Employees Table(Northwind Database) to a TextFile.
Now, I want to write data from Customers Table to the SAME TextFile.  In the text file, Customer Table information shoule be after Northwind information.

How do I do that?

I could write Northwind data to a file. But when I try to write Customer Table information on the same Text File, it writes only customer information deleting the Northwind information.

Please help........