creating a data monitoring ASP

I am creating an asp to display a trend(in a chart) in real time of a changing data.
The data is extracted from another website which is in a table(such as a price list).
And I need to store the data in a database first.
What is the approach to do this?
How do I extract the data?
What database I should use? MS access or MS SQL? Which one easier?
I really need help. Does anybody know what is the easier to do this is using VB.net?(do I need to use MS excel to do the web query first?)