Removing all customers and orders inf from DB

Hi, I've just recently set up a new website. To avoid work I imported the database from one of my other websites as the new one is selling many of the same products. However in doing so I also brought across all the customer and order information. My question is whats the best way of deleting these customers and their associated orders from the database?

So far as I can see their is no facility in admin to remove multiple customers or orders so I'm presuming I'll have to do it directly from the DB however I'm not entirely sure what the table structure is to ensure I remove ALL the relevant data from ALL the relevant tables.

Thanks
Tony

Log on Cpanel ( if you have it ), go to phpmyadmin, select your database and remove from there.

I'm not entirely sure what the table structure is to ensure I remove ALL the relevant data from ALL the relevant tables.
I then suggest that you do not mess with it

Thanks for the above. But in the meantime if somebody more capable could maybe offer some advice on the structure of the DB or even let me know where the relevant documentation is kept which details the relationships i.e. primary keys then I'll see if I can manage to remove the data without messing it up.

thanks

Done, db cleaned down

Anyone else wanting to do this for the above reasons can follow this thread (do a db backup first): http://www.zen-cart.com/forum/showthread.php?t=140440 or do it in phpmyadmin.