mysql - 如何对特定行使用求和查询

Question

我的 MYSQL 查询有点问题，在这里我返回所有结果以填充排名表。

这张 table 看起来像是这个的放大版

MEMBERS RESULTS TABLE
member_id      1   2   1   2
track_id       1   1   2   2
total_points  234 432 222 234

无论 member_id 是什么，当我需要它们计算每个 member_id 行的位置时，SUM(total) 将返回所有 total_points 的 SUM是。

SELECT members.member_id, members.teamname, SUM(total_points)
FROM members, members_leagues, member_results
   WHERE members.member_id = members_leagues.member_id
     AND members_leagues.league_id = '45'
       AND member_results.track_id = '1'
          AND member_results.member_id = members_leagues.member_id
             AND members_leagues.start_race >= member_results.track_id 

Answer 1

你需要一个 GROUP BY 子句

SELECT members.member_id, members.teamname, SUM(total_points)
FROM members, members_leagues, member_results
   WHERE members.member_id = members_leagues.member_id
     AND members_leagues.league_id = '45'
       AND member_results.track_id = '1'
          AND member_results.member_id = members_leagues.member_id
             AND members_leagues.start_race >= member_results.track_id 
GROUP BY members.memberID