I've actually moved away from using DB Tables because they were very 'static' in nature. I use regular Table type variables because I can add/remove columns from them on the fly. Is that the sort of functionality you're aiming for?
I actually am using table variables. Maybe I'm not using them in the correct way. I've attached pictures of my test case and circled the area I am have complications with. What I want to do is to reference back to my original variable by bknCaseID and gather the changed values from the database so I can confirm we are saving our data correctly. There are additional expectations as well that should occur in the database that I need to check. But I have been unable to find that 'work around' that was mentioned in the documentation from SmartBear.
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The documentation you referenced is for DB Table variable types. This is different than a Table variable type. The former retrieves data, via an SQL query, to the variable and updates the information. The latter is a variable that you can add/remove rows and columns from and is not dependant upon a database connection.
