I am looking to find a database system where a user can input data in a “form” format and that data can be linked to other data so that when one thing is queried, anything that it’s linked to will be found. For instance, Item #10 is put in the system, and it’s linked to Service #16 & Service #19. When Item # 10 is searched, service #16 and #19 should be returned and vice versa when either service #16 or #19 is searched, item #10 should be returned. This seems like a simple feature for a database system, but I am very new and unfamiliar with creating something like this. Thank you!!