To do that, I used SQL Server's OpenJson function that I discussed in an ... I could have the id column function as both a foreign and primary key pointing back to the Customers table I created in the ...

This, or these, attribute(s) are the candidate key(s) for the structure. The candidate key is also known as the primary key, or if a structure has ... that have many columns and have a need to use all ...

the Key attribute is required -- you have to use it to tell Entity Framework which of your columns corresponds to your table's primary key. This example tells Entity Framework that the Id property is ...