I'd like to store in a SQLite3 database 2 points: x1, y1, x2, y2, which each stand for corners of an area. I'd like to be able to check if a player is within this area and send them a message if they are. I'd have multiple areas or plots in the database. What's the most efficient way to do this besides iterating through an array during each player movement (which would most likely cause lag?).