any Good Article/Tutorial which can guide to insert data to database Using JSON in iPhone

Question

Hi guys.

I am developing an iPhone application in which I want to insert data into Web-server. some of my friends told me that JSON is best way to do this. Can anybody send me the link of any article/tutorial/blog which elaborate the use of JSON for inserting Date into remote database. I have found some tutorial but they are just showing to display data using JSON

Thanks in Advance.