I just came through a scenario regarding joomla website.
The scenario is:
Data in URL is passed to Joomla website and from the URL Joomla must store the data into the database.
Is this possible in Joomla?
You can get the value of a URL parameter with:
$value = JFactory::getApplication()->input->get('parameter');
Then you can use
JDatabaseQuery to insert data into the database.
You will need to develop a system plugin for that. The system plugin will grab the URL, parses the data that you need, and then store it in a table of your choice.