Webform to add row to specific sql table I have drupal running and have enabled a few modules including the webform module. I have opened phpmyadmin and added a new table with specific rows.

Now I want to link the two so that a user can log in to the site, fill out the webform with some data each day and I can insert a new row in the table and send each field to a specific column in that row. Later I will build a page for the user to view his inputs, maybe with graphs etc.

Am I on the right track? Is a webform the correct way to do this? And how do I make that link between the two?
Sorry, but no, you are on the wrong track.

Webform module is nice and easy, but it uses it's own storage. And whilst you can indeed use hooks to store a copy in your own table, it would take a pretty huge amount of work to do it properly.

It will be easier if you simply write your own module for that. If you don't know where to start, see Examples for Developers.