To create main database applying three applications on various locations

Question

Hello all.

i am faced the issue on programming of my appliaction consider as :

i am intend to create the application to manage three shops on different locations using only database, but i don't know to use which method to apply this my application.

i am intend to create a main database to put at another location , and applications on diffiferent locations connect to main database and interact with them susch as : staffs can be check out,manage, delete and update the bills on the shop look as scan barcode,after that data will be update on main database.

I don't know which methods to apply this case as : web service ,remoting connection, or local database after the end of day we will collect all database on three locations to statistics.


Could you give me recommendation ?


Thanks and best regards