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嗨，我遇到了曾经有效的查询问题。我的 SQL 技能并不是那么好，不确定我缺少什么。或者，如果这是正确的方法。也许改用临时表？

基本要点是给定一个特定的时间范围，我需要计算 5 个类的最高总积分。

trialScores - 保持分数/分数、试验、狗、人和成员表只是元数据

classId 5 需要不同的日期范围

这是我对 MySQL 的查询

select
    t.id,
    d.id,
    p.id,
    p.firstname,
    p.lastname,
    d.id dogId,
    d.dogName,
    c.id,
    c.class,
    t.trialStartDate,
    s.points,
    if(c.id = 5, '2012-08-01', '2012-11-18') as startDate,
    if(c.id = 5, '2013-07-31', '2013-12-31') as endDate,
    SUM(ts.points) AS pointsAggregate
from trialScores ts
    inner join trials t on t.id = ts.trialId
    inner join dogs d on d.id = ts.dogId
    inner join people p on p.id = ts.personId
    inner join classes c on c.id = ts.classId
where t.deletedAt is null
    and ts.deletedAt is null
    and ts.memberAtTrial = 1
    and d.omitFromTripleCrownDOY = 0
    and t.associationId = 1           
GROUP BY p.id, ts.dogId, ts.classId
having t.trialStartDate between startDate and endDate
order by ts.classId, pointsAggregate desc

看起来这修复了它，选择太多而不是 Group by？：

 select
d.dogName,
c.class,
p.firstName,
p.lastName,    
SUM(ts.points) AS pointsAggregate
from trialScores ts
inner join trials t on t.id = ts.trialId
inner join dogs d on d.id = ts.dogId
inner join people p on p.id = ts.personId
inner join classes c on c.id = ts.classId
where t.deletedAt is null
and ts.deletedAt is null
and ts.memberAtTrial = 1
and d.omitFromTripleCrownDOY = 0
and t.associationId = 1 
and t.trialStartDate between if(c.id = 5, '2012-08-01', '2012-11-18') and if(c.id = 5, '2013-07-31', '2013-12-31')  
GROUP BY ts.dogId, ts.classId
order by ts.classId, pointsAggregate desc
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1 回答 1

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您可以尝试以下查询并让其工作吗？

select
d.dogName,
c.class,
p.firstName,
p.lastName,    
SUM(ts.points) AS pointsAggregate
from trialScores ts
inner join trials t on t.id = ts.trialId
inner join dogs d on d.id = ts.dogId
inner join people p on p.id = ts.personId
inner join classes c on c.id = ts.classId
where t.deletedAt is null
and ts.deletedAt is null
and ts.memberAtTrial = 1
and d.omitFromTripleCrownDOY = 0
and t.associationId = 1 
and t.trialStartDate between if(c.id = 5, '2012-08-01', '2012-11-18') and if(c.id = 5, '2013-07-31', '2013-12-31')  
GROUP BY ts.classId,p.firstName,p.lastName 
order by ts.classId, pointsAggregate desc
于 2013-07-14T19:08:51.547 回答