It isn't hard to get the ItemResource. There are some threads about that. I think the complete structure of the db_itemresource.rdb is public and somewhere in this forum.
It's the easiest thing to get the ItemResource because you didn't have to find the correct structure.
You can start with Structorian to read the RDB-Files. You will be able to get a readable Table with the values for the Arcadia DB. Structorian is a easy to learn tool and you can use it without big programming knowledge.
Later you can try to write your own Tool to import the rdb files directly into your MSSQL DB.