I am new to joomla and seblod, i am trying them out to build a website for a small business to manage its employees and sales. 

To give a general scope, I have a snowflake data model, with employees (and its type tables, ex: employee table has an employee type key from the employee type table). I went through the seblod documentation, and got the basic knowledge to create forms. However, I can't seem to grasp the idea of how to link the forms to the mysql tables, and how to make it use multiple tables per form.

For example, employees can have multiple phone numbers, so the data model has a many to many table with the employee id and the phone number. Also there is the sales fact table, which has to register a sale, which employee does it, which customers did it, and generate the invoice and payment plans. 

So, what am I missing to be able to do this? Are the concepts of traditional db and websites different to how to build them in seblod and joomla?

Also, how would I generate reports later on, like a report per salesperson to check his kpis, or is this beyond the scope of seblod and would need a different extension?

Thanks in advance for your help.