Are the both "In the Data Base" and "On the Data Base" correct?| ASP.NET Core API

Question

I run into the following statement when I was reading a book about Learning ASP.NET Core API:

We reference “CommandItems” on our DB Context (_context) and return as a List of Command objects.

A complete explanation shown below:

And here is some explanations of the picture added above:

1. Class constructor utilizing the injection of or DB Context.
2. We reference “CommandItems” on our DB Context (_context) and return as a List of Command objects.
3. We call the FirstOrDefault method on our “CommandItems” to return a Command object (if one exists) that matches our desired ID.

I now have two questions about number 2:

2. We reference “CommandItems” on our DB Context (_context) and return as a List of Command objects.

1- Is it "on our DB Context" or "in our DB Context"? Are the both true?

2- What do we return when saying:

and return as a List of Command objects?

Have anything omitted after the the term "return"? (i.g. return them as..., or return CommandItems as...)

Answer 1

1. You can understand that your database Command Database (DbContext) has the table with name CommandItems
2. A database table should have multiple records, that why returning a List of objects corresponding to those records.