count the number of visitors?

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ASP.NET

SQL

Hi,
I'm doing project in asp.net
I want to do count the number of visitors: online, today, yesterday, this week, last week, this month, last month and total.
I want to use the procedure (or write one class to handle the better), you can help me?
Ah, online, total I have seen many people with global processing, but I see it's not really accurate. People can help me handle it by calculating the IP address?

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I want code can be count number of visitors online ,today, yesterday, this week, last week, this month, last month and total.
The reason I want do it for "IP address" because when using global to save file access number is still increasing even if only one person online(use two or more different browsers at the same time). -> Thus it is clear that the number of visitors at it's fake, inaccurate.
Moreover, when one person out of the site, the session does not take away that it takes one a long time (even if you have configured in the webconfig using sessionstate). -> I want one person out of the website, Session lost immediately when refresh the page.

Therefore I want to use the IP address of each computer to control the amount of access to more accurate.

Thanks.