We are building a website for business on global wise, for every country major cities are covered in this concept.

I need some suggestions from PHP Mysql People.

Can i create single databse for all cities or multiple databases. Because in this system contains some relations between cities ,every chamber need nearly 50 tables for networking and some other tables.

If I can create separate databases for every chamber there would be nearly 50\*1000 tables need because we have 1000 cities.

So Please give suggestions how can i build database for my system.

Thank you
Ravi