To do a new website has (course, physical products) the two charging items, but they have a different table structure has its own classification and different information fields! So they and how to design and the associated order list?? Late may increase the project (such as: family education) who designed online to share of the project, 20 small tribute

Products are generally do table, order table type which is distinguish project, but the values to pass judgment type queries is to check the table, which projects don't like such structure

If made public information such as product id name out and make a table of other entities (the length of the course, the product's type), such as in an information table! This order form which is without classification also need not query project, category are unified with a table to ensure the uniqueness of id

The two way which good? What are the advantages and disadvantages? You have what good plan??