How to Synchronise offline/online database

Question

I want to merge a software with a website. i want to the database of online data and offline data will automatically syncronise. Is it possible, if yes how??

 

for eg.

 

Offline Database structure

Table1

slno    name    rollno

1          atul       33

2       shankar   65

Online database Structure

Table1

slno    name    rollno

1          atul       33

2       shankar    65

 

please help me.