Debería poder hacer una subconsulta correlacionada para eliminar los datos. Encuentre todas las filas que estén duplicadas y elimine todas menos la que tenga la identificación más pequeña. Para MYSQL, se debe usar una combinación interna (equivalente funcional de EXISTS), así:
delete games from games inner join
(select min(id) minid, date, time,
hometeam_id, awayteam_id, locationcity, locationstate
from games
group by date, time, hometeam_id,
awayteam_id, locationcity, locationstate
having count(1) > 1) as duplicates
on (duplicates.date = games.date
and duplicates.time = games.time
and duplicates.hometeam_id = games.hometeam_id
and duplicates.awayteam_id = games.awayteam_id
and duplicates.locationcity = games.locationcity
and duplicates.locationstate = games.locationstate
and duplicates.minid <> games.id)
Para probar, reemplace delete games from games con select * from games . No solo ejecute una eliminación en su base de datos :-)
