Hi,

> Is there any problem in creating varchar indexes?
> The performance is better when integer indexes are used?
> Suppose the country code varchar(2), is it good, bad, or neutral?

Good. Nothing wrong with it.

With regards,

Martijn Tonies
Database Workbench - developer tool for InterBase, Firebird, MySQL & MS SQL
Server.
Upscene Productions
http://www.upscene.com