Thanks for the question adding a reference in all PrestaShop products. You did not give much detail on what you're trying to do, so I am assuming that you are simply trying to add some information to ALL of the products in your database without having to go through each product one at a time. The main way to do this will be by editing your database and using an update script (MYSQL update script: http://dev.mysql.com/doc/refman/5.7/en/update.html). Or, you may want to consider purchasing an add-on module from PrestaShop that will update your products for you (http://addons.prestashop.com/en/search?id_category=0&search_query=product).
I hope this helps to answer your question, please let us know if you require any further assistance.
Thanks for the question adding a reference in all PrestaShop products. You did not give much detail on what you're trying to do, so I am assuming that you are simply trying to add some information to ALL of the products in your database without having to go through each product one at a time. The main way to do this will be by editing your database and using an update script (MYSQL update script: http://dev.mysql.com/doc/refman/5.7/en/update.html). Or, you may want to consider purchasing an add-on module from PrestaShop that will update your products for you (http://addons.prestashop.com/en/search?id_category=0&search_query=product).
I hope this helps to answer your question, please let us know if you require any further assistance.
Regards,
Arnel C.