이 레슨은 당분간 영어로 제공돼요.
Order and speed
A leaderboard needs the highest scores first, ten at a time, and it needs them fast even with millions of players. sort and limit take care of the order; indexes take care of the speed.
이 레슨은 당분간 영어로 제공돼요.
A leaderboard needs the highest scores first, ten at a time, and it needs them fast even with millions of players. sort and limit take care of the order; indexes take care of the speed.