php - 如何从 mysql 足球 [足球] 结果表中即时输出排名表？

Question

我一直在尝试查找有关此主题的内容，但似乎找不到任何内容，这里有一些问题，但它们不适用于我的特定项目。

我问了一个关于更新表格的类似问题，但它对我真正想要的不起作用 这是结果列表。

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|id  |   hometeam   |goalsfor|goalsagainst|   awayteam   |
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| 1  |Inter Milan   |   3    |     1      | FC Barcelona |
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| 2  |FC Barcelona  |   1    |     0      | Inter Milan  |
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| 3  |Inter Milan   |   4    |     0      | AC Milan     |
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| 4  |AC Milan      |   0    |     2      | Inter Milan  |
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| 5  |Real Madrid   |   2    |     0      | AC Milan     |
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| 6  |AC Milan      |   2    |     2      | Real Madrid  |
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| 7  |FC Barcelona  |   2    |     2      | AC Milan     |
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| 8  |Real Madrid   |   2    |     0      | Inter Milan  |
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| 9  |Inter Milan   |   3    |     1      | Real Madrid  |
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| 10 |FC Barcelona  |   2    |     0      | Real Madrid  |
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| 11 |Real Madrid   |   1    |     1      | FC Barcelona |
 --------------------------------------------------------

基本上我希望能够创建一个按顺序对球队进行排名的排名表，我想即时显示这个表而不是将其放入数据库

Pos Team           Pld  W   D   L   F   A   GD  Pts
1   FC Barcelona    5   2   3   0   8   5   3   9
2   Inter Milan     6   2   2   2   11  10  1   8
3   Real Madrid     6   2   2   2   8   8   0   8
4   AC Milan        5   0   3   2   8   12  -4  3

POS=位置 W=赢 D=平 L=输 F=进球 A=进球 GD=进球差 Pts=积分

我认为最有效的方法是分配胜、平和负，将进球数和进球数相加，并在回显数据时计算总比赛场数和得分。

但是我如何分配输赢？并计算进球数和失球数？

Answer 1

首先将得分表合并在一起，交换主队和客队并交换进球数。这为您提供了一些易于聚合的源数据，生成记分卡的查询如下所示:

select 
    team, 
    count(*) played, 
    count(case when goalsfor > goalsagainst then 1 end) wins, 
    count(case when goalsagainst> goalsfor then 1 end) lost, 
    count(case when goalsfor = goalsagainst then 1 end) draws, 
    sum(goalsfor) goalsfor, 
    sum(goalsagainst) goalsagainst, 
    sum(goalsfor) - sum(goalsagainst) goal_diff,
    sum(
          case when goalsfor > goalsagainst then 3 else 0 end 
        + case when goalsfor = goalsagainst then 1 else 0 end
    ) score 
from (
    select hometeam team, goalsfor, goalsagainst from scores 
  union all
    select awayteam, goalsagainst, goalsfor from scores
) a 
group by team
order by score desc, goal_diff desc;