I'd love a feature that allows you to select which kind of queries can be run from the Data Explorer UI.

Running ad-hoc queries is a something very common for a development team so its important to allow devs to have access to the Data Explorer, but what is also very important is to make sure that the ad-hoc queries won't impact the production database performance, which might happen in case the queries are not well written and are not making use of indexes.

It would be really great to have some sort of "allowed queries" list, or at least one option to only allow queries that are effectively using indexes to be run.