Applying a sale or discount to all products in Drupal's Ubercart

Question

I'd like to temporarily apply a discount, in the form of a percentage, to all of the Products in my Ubercart store. It would be especially helpful, but not necessary, if this could also vary based on a Product's field.

Answer 1

The Ubercart Discount Coupons module can provide coupon discounts and the Rules module can be used to apply it automatically.