I am developing a billing system software. For this I have created a database it contains many tables database and this is in local system all transactions data will be stored in local systems database.
I would like to provide data backup tables in server. Whenever the person(billing s/w user) wants he/she can upload the data to server(only newly added data should be uploded if existing data is there).
If local system data is currepted or get deleted by some reason it can be downloaded from the database server. This all features should be done by using billing software. How to do this.