Are multiple foreign keys in a single field possible?

Question

I want to know if there is a way to have multiple values in a single field in a MySQL database where each value is a foreign key referencing one other table.

I am de

Answer 1

If I understand you correctly, the relation product : product_certification is 1:M you can create a foreign key from product_certification to products via product_id, instead of having product_certification_id in the products table (which is invalid, since the product can have more than 1 certification)