What is the correct table structure to cross sell products?

I have implemented an e-commerce system which is currently being used in about 10 different websites. I would like to develop to second phase to it by implementing cross sell/up sell so that I can display related products to the customer when viewing one item.

The way I’m planning on forming the relationship between two liked products is by creating a table that with the following fields:

Create table cross_sell…{
Id int..,
Product_id int.., - this will hold the ID of the source product I want to compare
Related_product_id int – this will hold the ID of the product that is similar to Product_id
}


I’m not so sure if this is the industry standard for creating cross-sell/up-sell relation, so I would greatly appreciate it if you provide me with some input.