Remote queries

RE: [GENERAL] FOREIGN KEYHello everybody,

This is my first time posting to this list, so forgive me if my question seems dumb or ill informed.

I'm writing an application in c++ which involves a central server which is connected to by an small number (say up to 50) of clients. The clients collect data (actually sales data--they are POS terminals) and batch it periodically to the central server. They also periodically download info off of the central server. Since this will be over a private network (not internet), I felt that straight SQL queries over TCP/IP would be fine. Now, what I would LIKE to do would be something like this (if you understand my pseudo-code):

INSERT INTO remote_sales_table VALUES
(SELECT sales_info, local_terminal_id FROM local_sales_table WHERE uploaded = 'n')

However, as the two tables reside in two separate databases, that won't work, will it? So, my question is, what is the best way to synchronize a master database with multiple client databases? Right now, I have a c++ routine that does the local select to get all the sales data and then steps through each row and builds an insert for the master server. Is there a more elegant solution?

If there is not a better solution already existant, I am going to build some generic procedures and objects in c++ for synchronizing tables of this sort. Is anyone else interested in a project like this? I'll have a project up on sourceforge in a bit.

By the way, this POS terminal project I'm talking about is already up on sourceforge (it's called poskiosk), but please only look at the code if you're really interested--I would be terribly embarrassed! (It's kind of pathetic at this stage)

Thanks a lot!

Chuck Shunk