Personally I don't think Railway should offer either a query or a data tab, they are currently massively flawed for anything other than treating it like a read-only way to get a glance at your data. It doesn't seem like something that would be worthwhile to implement correctly because it would be so hard and time consuming to get right, and if it's not perfect they shouldn't offer it, using dedicated database software will always be better.

I guess that's fair. But if Railway offers a writable interface (which it currently does), I think it should at least have a query tab.

You're right, it doesn't make sense to have one without the other, that's why I think neither should be an option until something that works for every scenario can be implemented.