如何创建多个MySQL计数/分组依据/子查询？

我的数据库中有一个包含足球比赛结果的表格，相关列包括matchNumber（基于日期的数字）、Result（结果“W”、“D”或“L”）、goalsFor、goalsAg和manager

我有一个疑问：

SELECT COUNT(*) AS P,  
(SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "W") AS W,  
(SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "D") AS D,  
(SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "L") AS L,  
SUM(GoalsFor) AS F,  
SUM(GoalsAg) AS A,  
ROUND((SELECT SUM((((SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "W") * 2) +(SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "D")))/((SELECT COUNT(*) FROM match_results WHERE manager = 13)*2)*100),2) AS pct  
FROM match_results WHERE manager = 13;

返回以下结果：

P   W  D  L  F   A   Pct  
213 92 49 72 296 247 54.69

这很好用。然而，结果跨越了许多季节，我想将查询的输出分解以反映这一点。我尝试了以下方法：

SELECT LEFT(matchNumber,4) AS Season,  
COUNT(*) AS P,  
(SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "W") AS W,  
(SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "D") AS D,  
(SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "L") AS L,  
SUM(GoalsFor) AS F,  
SUM(GoalsAg) AS A,  
ROUND((SELECT SUM((((SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "W") * 2) +(SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "D")))/((SELECT COUNT(*) FROM match_results WHERE manager = 13)*2)*100),2) AS pct  
FROM match_results WHERE manager = 13  
GROUP BY Season;

此查询的结果可以在下图中看到：

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正如你所看到的，“季节”、“p”、“F”和“A”列已经给出了我想要的结果，但是其余的列重复了总数。因此，我的问题是，我如何调整我的查询，以便“W”、“D”和“L”列也能给出每行输出中的年度总计，而不是总计？

问题是，您的三个子查询不会按季节限制它们的计数。尝试将其更改为：

SELECT @season:=LEFT(matchNumber,4) AS Season,  
COUNT(*) AS P,  
(SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "W" AND LEFT(matchNumber,4)=@season) AS W,  
(SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "D" AND LEFT(matchNumber,4)=@season) AS D,  
(SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "L" AND LEFT(matchNumber,4)=@season) AS L,  
SUM(GoalsFor) AS F,  
SUM(GoalsAg) AS A,  
ROUND((SELECT SUM((((SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "W") * 2) +(SELECT COUNT(*) FROM match_results WHERE manager = 13 AND Result = "D")))/((SELECT COUNT(*) FROM match_results WHERE manager = 13)*2)*100),2) AS pct  
FROM match_results WHERE manager = 13  
GROUP BY Season;

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感谢您的建议，但它不起作用，它返回错误“where子句中的Unknown column'mr.seasure'”好的，我已经更新了我的答案。它现在使用一个变量

@seasure

，该变量似乎在子查询中起作用