Should ids be mapped to the implementation type

This is a question of model design, and hopefully some architecture nerds have strong opinions on this. I’ve been developing one that I will post in an answer.

Should I avoid data duplication?

I’m trying to design a relatively simple ERP system. However, there are some requirements that complicate things a little bit:

Should I avoid data duplication?

I’m trying to design a relatively simple ERP system. However, there are some requirements that complicate things a little bit:

Should I avoid data duplication?

I’m trying to design a relatively simple ERP system. However, there are some requirements that complicate things a little bit:

Converting a one-to-many xml design to a many-to-many

I have an xml file format that looks something like this:

Converting a one-to-many xml design to a many-to-many

I have an xml file format that looks something like this:

Converting a one-to-many xml design to a many-to-many

I have an xml file format that looks something like this:

Converting a one-to-many xml design to a many-to-many

I have an xml file format that looks something like this:

What happens to database design process when ORM tools are used?

I have learned about database design, including normalization during my undergraduate course. When we have to model a database for a system, we can start with an ER model and then convert it to the relational model and then we could normalize the design, to come up with the final schema of the database.

How can I create a model to efficiently answer the question of – where to place my db-interaction code I am about to write?

I am seeking the right model for storing and retrieving data, when working with any specific class, while keeping in mind the bigger picture.