PostgreSQL计算总和和使用结果返回赢家

Question

我正在做运动分析（沙滩排球），并得到了一张表moves。举例来说，移动是服务王牌，阻止错误或攻击获胜者（由标签标识）。一个举措可以提高a队，b队的得分或者保持原状。

部分样本moves数据。

set, tag, points_team_a, points_team_b 
---,----,--------------,-------------- 
    1, 520,    1,    0 
    1, 510,    0,    0 
    1, 300,    0,    1 
    1, 410,    0,    0 
    1, 620,    0,    0 

我有一个查询返回整体结果。

select 
    moves.set, 
    sum(moves.points_team_a) as team_a, 
    sum(moves.points_team_b) as team_b 
from moves 
where match_uuid = '26d41fc6-13d3-4af7-a5a3-3ec21bf06f03' 
group by set 

这表明team_a拿下首盘21:12和第二组21:18。

set, team_a, team_b 
    1,  21,  12 
    2,  21,  18 

是否可以将总体匹配结果（在本例中为team_a为2：0）添加到查询中？

Answer 1

这是你想要的吗？

select m.*, 
     sum((team_a > team_b)::int) over (order by set) as running_a_wins, 
     sum((team_b > team_a)::int) over (order by set) as running_b_wins 
from (select m.set, sum(m.points_team_a) as team_a, sum(m.points_team_b) as team_b 
     from moves m 
     where m.match_uuid = '26d41fc6-13d3-4af7-a5a3-3ec21bf06f03' 
     group by set 
    ) m