I think the computer.record creation date is what you are looking for.
Ok, and how do I find that by query or it is only available by SQL query (we are running SQL for the DB)? Our customer is asking for it to identify machines that were installed recently, IE: machines that were part of the current refresh.
Its located in the top level of the inventory when you create a query. I get the exact same request and that is the field I use in my query.