How we can upload data tally to SQL, only updated data

Question

Hi,
Please help me, I want to upload data from tally to our Local SQL,how I can achieve it?
i want only updated data should be uploaded,who uploaded earlier need not be uploaded.

one more thing I want suppose we have uploaded data from 4 june 2016 but there was a receipt
Receipt0012 who is updated today by amount 100000 to 10000 but tally entry is on same date i.e. 4 june 2016,by mistake client gave 100000 instead of 10000.now he updates it in tally but now how i can update it in Local SQL?

I am using C# and SQL.

My software like first getting data from Tally to Local SQL and then Local SQL to cloud server


I want to try upload data from tally to our local SQL and then Local SQL to Cloud server.how i can achieve it by using C# application?

time consuming should be very-very small.
please give me satisfied solution.

Thanks.