Patter Gateway data table, why one gate for one table?

Question

ASP.NET

Hello! Tell me why one data table gateway is used only for one table, i.e. when making some kind of selection using the gateway, we select fields from only one table, information from related tables is not loaded?

Answer 1

If I understand you correctly, there are two ways:
1. Use virtual
2. Either Include when requesting data
In general, it would not hurt to read, for example - metanit.com/sharp/mvc5/5.7.php Chapter 5, your topic...