If someone were interested in curiosity to understand how many unique players are connected to their server, here is the query.
If a player is logged in with 10 pg, it is only counted once.
If a player is logged in with 10 pg, it is only counted once.
Code:
select count(*) as aggregate from `player`.`player` where `last_play` >= (now() - INTERVAL 5 MINUTE) group by `ip`