Q:

Magento - Deleted Base url key

I was working on cleaning up my url:
http://mydomain.com/shop/shop/deals
I was going through my settings in the configuration tab in the admin panel on Magento and change my secure and unsecure base urls to remove the first base url "shop" so my web page would then read:
http://mydomain.com/shop/deals
So my i changed the unsecure base urls from mydomain.com/shop to mydomain.com and my secure from 12.345.67.89/shop to 12.345.67.89.  Which was the wrong thing to do. 
I now cannot reload the page or get to the admin console.  
How could i access these files through FTP and change the correctly there?? 

A:

When you make the changes in the admin panel the changes are made in the database not in any file.  You will have to make the changes now in database.  
1.Go to you Database and select the core_config_data table

Under this table find web/unsecure/base_url and web/secure/base_url.  Make the changes here. 

Don't forget to clear the cache in var/cache folder

