updation in database related to a web service

we can fetch data from xml file through a link but can we update that xml file data through link.. and make 开发者_StackOverflow中文版changes in database related to it???

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You have a low acceptance rate... maybe you should accept some previous questions you asked.

Anyway, if you mean a web database, then you need to send a web request. Package your data as a json object or something and have the web server handle it.

If you mean on the iPhone, you need to read up on SQLite.