If only this were a question easily answered... The problem is that no one is likely to be interested in sharing any actual rate information, as doing so impairs their ability to negotiate such rates. It's one of those situations where the first side to mention a rate is the loser, and even when it's not actually true, the perception that it IS true still takes over, because, it's such a simple piece of common sense that no one is willing to believe otherwise, no matter how sound the argument.
As an example, I talk to recruiters on a regular basis, and far too often, they think the answer to my question of "What kind of rate are we talking about?", is "What rate are you looking for?". That will always turn me off, and it should turn you off too. Stop accepting that baloney and respond with "Ummm... excuse me, but... you didn't answer my question." Then stop talking. Don't give in to the temptation to fill the void. If they repeat their question, then your response is: "I'm sorry, but if you can't even answer a simple rate question, how can I possibly trust your company with anything else?". There's also no excuse for any of these recruiters not having full command of the English language, so if their accent is just too thick to understand, ask to speak to someone whose command of the English language is good enough to allow you to communicate, and if that agency doesn't have any such person, then go elsewhere.
There's no good answer to your question anyway, as the rate you can get is almost always heavily dependent on the rate you are currently getting. It's going to have to be in the same ballpark. Recognize that just having experience isn't enough when it comes to database development work. I know of folks with 10 years of experience that still wouldn't know a CTE from a hole in the ground, and chances are, they should never get hired for such work, but they repeatedly get hired anyway.
Also, the state you'd be getting hired in matters a lot. You can get rates in CA and in NY that just don't exist elsewhere, but good luck having those rates, after taxes, actually be equal to the same rate if offered in Michigan, or Indiana, for example. I won't work in either of those two states for that reason. I couldn't possibly get a rate I could live with after taxes.
Does that help?