.
SELECT
d.player_id,
MAX(d.winStreak) AS maxWinStreak
FROM (
SELECT
@cUser := 0,
@winStreak := 0
) v, (
SELECT
player_id,
won,
timestamp,
@winStreak := IF(won=1,IF(@cUser=player_id,@winStreak+1,1),0) AS winStreak,
@cUser := player_id
FROM (
(
SELECT
player_id,
won,
timestamp
FROM matchTable
) UNION (
SELECT
opponent_id,
loss,
timestamp
FROM matchtable
)
) m
ORDER BY
player_id ASC,
timestamp ASC
) d
GROUP BY d.player_id
, / . player_id, max winStreak, , , .
, :)
, , ..
matches (
matchID,
winningPlayerID,
timeStamp
)
players (
playerID
-- player name etc
)
matchesHasPlayers (
matchID,
playerID
)
SELECT
matches.matchID,
matchesHasPlayers.playerID,
IF(matches.winningPlayerID=matchesHasPlayers.playerID,1,0) AS won
matches.timestamp
FROM matches
INNER JOIN matchesHasPlayers
ORDER BY matches.timestamp
SELECT
d.player_id,
MAX(d.winStreak) AS maxWinStreak
FROM (
SELECT
@cUser := 0,
@winStreak := 0
) v, (
SELECT
matchesHasPlayers.playerID,
matches.timestamp,
@winStreak := IF(matches.winningPlayerID=matchesHasPlayers.playerID,IF(@cUser=matchesHasPlayers.playerID,@winStreak+1,1),0) AS winStreak,
@cUser := matchesHasPlayers.playerID
FROM matches
INNER JOIN matchesHasPlayers
ORDER BY
matchesHasPlayers.playerID ASC,
matches.timestamp ASC
) d
GROUP BY d.player_id