You'll need to return a class that inherits from ActionResult.
Probably you want something like:
public ActionResult ViewQuery() {
DBController dBController = new DBController();
return View(dBController.usp_xxxxx());
}
This returns the view with the result passed in as Model.
If you want to return JSON use:
public ActionResult ViewQuery() {
DBController dBController = new DBController();
return JSON(dBController.usp_xxxxx());
}