It is a different from this question, because as I explain in my own post, my purpose is to find out why databases don't use pointers instead of keys and what are the other options to implement its functionality.
As I read the implementation of relational database, there isn't anything with the concept of pointer in it.
Here is my questions:
Why there isn't any pointer in the relational model?
Many databases use technical IDs that one could call pointers. It's like generating a number (like an address) with which to find the record in the table.
Say you have a table of orders and another of customers. The customers table would contain some customer ID. A record in the orders table would also contain a customer ID. So an order (a record in the order table) would thus point to the related customer (a record in the customers table).
Is there any system file feature that isn't implemented by relational model?
I can't think of any. Both systems can be used to store, organize, find, copy, move, backup, and versionize files.
