My company is in Indonesia. Having branches separates in all province. We use Oracle Database. All the branches must having internet connection to connect the application. But there is one branch, the province is so deep inside. Sometimes the internet is cut very often. so the main branch have a problem to get their daily transactions. They have to make manual transaction if the internet not work. And they will input their transaction when the internet connection is coming. As the result we will not get accurate data. On that time the IT have to make update their transaction date. to get the accurate data. It is really wasting the time..

From my story. Is there any solution to face this?
Is it possible to do mirroring database on that branch. For example they have a local database. And when the internet is coming the new datas from their local database will update the main database from the main branch? Or on What is the concept of mirroring database that oracle has?