Question

我在下面使用锦标赛系统。该表包含所有团队的注册长度。结果将是一个记分牌，总计所有球队的总分数。

我正在尝试将RANK（）函数放入我的SQL中，但我现在卡住了。我希望从我的数据库中获得当前球队的得分。有人有任何想法吗？我正在使用MariaDB。

    select team, sum(length) as totalScore
from
   (SELECT t.*,
       @num_in_group:=case when @team!=team then @num_in_group:=0 else @num_in_group:=@num_in_group+1 end as num_in_group,
       @team:=team as t
    FROM reg_catches t, (select @team:=-1, @num_in_group:=0) init
    ORDER BY team asc, length desc) sub
WHERE sub.num_in_group<=4
GROUP BY team
ORDER BY totalScore DESC;

表

team length
-----------
26   70
25   70
25   95
25   98
25   100
25   100
25   100
25   122

当前输出

team    totalScore
--      --
25      520
26      70

通缉输出

rank    team    totalScore
--      --      --
1       25      520
2       26      70

Answer 1

SET @row = 0;
SELECT @row:=@row + 1 rank, a.team, a.total_score 
FROM(SELECT team, sum(r.length) as total_score FROM reg_catches r GROUP BY 
r.team) a;

试试上面的

Answer 2

现在在Dickson的帮助下走到这一步，现在的问题是，排名似乎是基于团队ID而不是totalScore：O

SET @row = 0;
SELECT @row:=@row + 1 rank, team, sum(length) as totalScore
from
   (SELECT t.*,
       @num_in_group:=case when @team!=team then @num_in_group:=0 else @num_in_group:=@num_in_group+1 end as num_in_group,
       @team:=team as t
    FROM reg_catches t, (select @team:=-1, @num_in_group:=0) init
    ORDER BY team asc, length desc) sub
WHERE sub.num_in_group<=4 and competition = "#COMPID" and disqualified = 0
GROUP BY team
ORDER BY totalScore DESC

当前输出

rank    team    totalScore
1   28381   479
58  28468   439
20  28412   436
25  28419   432
14  28404   427
5   28388   421

通缉将是

rank    team    totalScore
1   28381   479
2   28468   439
3   28412   436
4   28419   432
5   28404   427
6   28388   421

SQL小提琴：http://sqlfiddle.com/#!9/107d98/2/1

SQL Subquerys和RANK（）

2 个答案: