php - 对mysql中同一个表的多列求和

Question

我正在开发体育网站。

在此站点中，我有两个表，一个是 tbl_team，用于存储球队详细信息，另一个表是 tbl_tournamentmatches，用于存储不同轮次锦标赛比赛的详细信息。

在我的tbl_tournamentmatches中，我存储team1_id、team2_id、team1_score和team2_score.

我的表有这样的条目:

tbl_tournamentmatches

match_id team1_id team2_id team1_score team2_score
5        4        9        15          5
6        9        16       15          5
7        4        16       5          15
8        4        16       5          15

tbl_team

team_id team_title
4       KKR
9       RR
16      CSK

我想要的结果应该是这样的:-

Team name Score
CSK        35
KKR        25
RR         20

我使用了这个查询:-

select * from 
(
   SELECT sum(team1_points) as totalpoints,t.team_title 
   from tbl_team t 
   left join tbl_tournamentmatches m 
   on t.team_id = m.team1_id 
   where tournament_id = 3 AND agegroup_id = 36 
   group by team1_id 
   union 
   SELECT sum(team2_points) as totalpoints,t.team_title 
   from tbl_team t 
   left join tbl_tournamentmatches m 
   on t.team_id = m.team2_id 
   where tournament_id = 3 AND agegroup_id = 36 
   group by team2_id
) s

但是我得到了这样的结果:-

KKR   25
RR    15
RR     5
CSK   35

任何帮助将不胜感激。提前致谢。

Answer 1

进行连接以获得每场比赛的球队和分数，然后对结果进行求和:-

SELECT team_title, sum(team_points) as totalpoints 
FROM 
(
   SELECT team1_id AS team_id, team1_points AS team_points, t.team_title 
   FROM tbl_team t 
   LEFT JOIN tbl_tournamentmatches m 
   ON t.team_id = m.team1_id 
   WHERE tournament_id = 3 AND agegroup_id = 36 
   UNION ALL
   SELECT team2_id AS team_id, team2_points AS team_points, t.team_title 
   FROM tbl_team t 
   LEFT JOIN tbl_tournamentmatches m 
   ON t.team_id = m.team2_id 
   WHERE tournament_id = 3 AND agegroup_id = 36 
) s
GROUP BY team_id, team_title