计算用户的最长输赢

Question

我已经设法使其工作，但需要帮助改进查询并优化它以获取更多参数。

查询将计算赢得和输掉游戏的最长条纹，到目前为止，我已经设法通过获取胜出来使其成为单独的查询。但我想立即取两者。如何通过进一步构建此查询来实现这一目标（这将计算最长的连胜）：

SELECT MIN( c.ID ) - a.ID + 1 as Streak
    FROM games AS a
    LEFT JOIN games AS b ON a.ID = b.id + 1 AND b.P1Outcome= 'win'
    LEFT JOIN games AS c ON a.ID <= c.id AND c.P1Outcome= 'win'
    LEFT JOIN games AS d ON c.ID = d.id - 1 AND d.P1Outcome= 'win'
    WHERE
      a.UsrID = x
      AND a.P1Outcome= 'win'
      AND b.ID IS NULL
      AND c.ID IS NOT NULL
      AND d.ID IS NULL
    GROUP BY a.ID
    ORDER BY Streak

ID =每场比赛的主键

P1Outcome =游戏中的用户结果

UsrID =用户ID

首先可以有任何改进，如果可能，它还可以同时获取连败吗？谢谢你的时间。