There are multiple solutions to this issue, depending on your implementation and the type of data you want to synchronise with your definitions uploaded to ShapeDiver.
Did you have a look at this topic for example, which explains how to pull data from a Google Sheet?
You could also use any other service available through HTTP requests along with the Switflet plugin to pull data every time a computation is run.
Note that in all these cases, you will either need to empty the cache of your models when the database is updated, or force new computations using a model input with a timestamp for example.
Those are just a few examples on how to connect to your dynamic database. If you would like to discuss more closely with our team how to best move forward, feel free to join the next onboarding call, which is available with your Business account.