Sorry to necro this, but searching on force tutorialb start zone got me here.
Here is the SQL to send all new players to tutorialb in front of Arias and bind them there was well. (back up your start_zones table in case you want to restore some day)
Code:
UPDATE start_zones SET zone_id = 189, x = -120.25, y = -62.53, z = 18.36, start_zone = 189, bind_x = -120.25, bind_y = -62.53, bind_z = 18.36 where zone_id IS NOT NULL;