Hello,

From what ive read it sounds like it has nothing to due with the customer side of the database but configuration table and maybe configuration group table, do u have a backup of your database prior to the problem, If you do open the SQL file in a text editor and extract both tables and restore them to your Database, you will not lose any of your product info or customer info, you would lose any configuration changes made after the backup and you would need to reset them back in the admin section,

Rich