Hello from Italy!

I'm going to create a php script that registers and reports stats for
20/30 externals sites (with about 2.000 daily visitors each one).

I need to configure the tables (mysql) where I would store visitors data.

I need help to choose between these solutions:

a) two table visitors and visits whit a field site_id to distinguish
between monitorated sites visitors

b) two table for each site: site_1_visitors, site_1_visits,
site_2_visitors, site_2_visits etc...

What do you think about it?

Thanks!!