take last updated data from one database then put in another

[vpn2012]

I have two databases they are same in structures and tables every thing(example A and B) that i want to take last update data of B then but in A)because A is main database which methods or ways can i use to achieve this task
Notes:A is main branch and b is another branch i want to but all data recently updated to B because i will make balance sheet in database A )