postgresql - PostgresSql how to GROUP BY multiple columns and get all other columns aswell? -

i want group 3 columns , data columns.

this worked, don't data lap.valid, lap."timestamp" , lap.maxspeed_kmh:

select      players.name,     cars.car,     tracks.track,     min(lap.laptime) best_laptime lap     join playerinsession on lap.playerinsessionid = playerinsession.playerinsessionid     join session on playerinsession.sessionid = session.sessionid     join tracks on session.trackid = tracks.trackid     join cars on playerinsession.carid = cars.carid     join players on playerinsession.playerid = players.playerid group     players.name,     cars.car,     tracks.track; 

this want do:

select      players.name,     cars.car,     tracks.track,     min(lap.laptime) best_laptime,     lap.valid,     lap."timestamp",     lap.maxspeed_kmh lap     join playerinsession on lap.playerinsessionid = playerinsession.playerinsessionid     join session on playerinsession.sessionid = session.sessionid     join tracks on session.trackid = tracks.trackid     join cars on playerinsession.carid = cars.carid     join players on playerinsession.playerid = players.playerid group     players.name,     cars.car,     tracks.track; 

but error "column lap.valid must appear in group ...", how fix this?

the important thing fastest lap time each player each car , track combo. there hundreds of lap times each track done multiple players in different cars.

check distinct on

select distinct on (p.name, c.car, t.track)     p.name,     c.car,     t.track,     l.laptime best_laptime,     l.valid,     l."timestamp",     l.maxspeed_kmh     lap l     join     playerinsession on l.playerinsessionid = playerinsession.playerinsessionid     join     session on playerinsession.sessionid = session.sessionid     join     tracks t on session.trackid = t.trackid     join     cars c on playerinsession.carid = c.carid     join     players p on playerinsession.playerid = p.playerid order p.name, c.car, t.track, l.laptime