不在子查询中工作的MySQL组

我有这个问题，而且效果很好。我使用MINhome_价格作为起始价格显示，我使用此查询来查询api和添加WHERE子句的位置，因此如果我按价格搜索，MINhome_价格会发生变化

SELECT MIN(home_price) as min_home_price,
   id,
   name,
   community,
   maplocation,
   locationLabel,
   logo 
FROM ourCommunity 
INNER JOIN readyBuilt 
   ON community = home_community 
INNER JOIN rb_locations 
   ON readyBuilt.home_location = rb_locations.locationId 
WHERE id IN ( SELECT DISTINCT id 
                 FROM ourCommunity 
                 INNER JOIN readyBuilt 
                        ON community = home_community 
                 WHERE isDeleted = 0 AND is_upcoming = 0) 
   AND home_status = 1 
 GROUP BY id,name,community,mapLocation,locationLabel,logo 
 ORDER BY name

所以我的解决方案是使用子查询

SELECT id,
   name,
   community,
   maplocation,
   locationLabel,
   logo, 
   (SELECT MIN(home_price) as min_home_price 
          FROM ourCommunity 
          INNER JOIN readyBuilt 
                 ON community = home_community 
          INNER JOIN rb_locations 
                 ON readyBuilt.home_location = rb_locations.locationId 
          WHERE id IN ( SELECT DISTINCT id 
                        FROM ourCommunity 
                        INNER JOIN readyBuilt 
                               ON community = home_community 
                        WHERE isDeleted = 0 
                               AND is_upcoming = 0) 
                 AND home_status = 1 
          GROUP BY id,name,community,mapLocation,locationLabel,logo 
          ORDER BY name) as org_min_home_price 
FROM ourCommunity 
INNER JOIN readyBuilt 
   ON community = home_community 
INNER JOIN rb_locations 
   ON readyBuilt.home_location = rb_locations.locationId 
WHERE id IN ( SELECT DISTINCT id 
                 FROM ourCommunity 
                 INNER JOIN readyBuilt 
                        ON community = home_community 
                 WHERE isDeleted = 0 AND is_upcoming = 0) 
   AND home_status = 1 
 GROUP BY id,name,community,mapLocation,locationLabel,logo 
 ORDER BY name

但是当我执行第二个查询时，我得到了这个错误

子查询返回超过1行

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当我删除组时，我没有收到任何错误，因为每行的价格是相同的。有人对如何完成我想完成的事情有什么建议吗

如果您添加一个价格作为过滤器，返回的最低价格将不是表的实际最低价格，这是正常的

您可以加入社区分组的每个minhome_价格的结果集

SELECT min_home_price,   
   id,
   name,
   community,
   maplocation,
   locationLabel,
   logo 
FROM ourCommunity
INNER JOIN (select min(home_price) min_home_price, home_community from readyBuilt group by home_community) b on b.home_community = community
INNER JOIN readyBuilt a ON community = a.home_community 
INNER JOIN rb_locations ON a.home_location = rb_locations.locationId 
WHERE id IN ( SELECT DISTINCT id 
                 FROM ourCommunity 
                 INNER JOIN readyBuilt ON community = home_community 
                 WHERE isDeleted = 0) 
AND home_status = 1 
GROUP BY id,name,community,mapLocation,locationLabel,logo 
ORDER BY name;

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不要对大型数据集使用MySQL中的嵌套子查询，否则MySQL可能会自行创建临时表，从而影响查询性能

我已尝试删除最后一个嵌套查询，如下所示：

SELECT b.min_home_price,   
oc.id, oc.name, oc.community, oc.maplocation, oc.locationLabel, oc.logo
FROM ourCommunity oc
INNER JOIN (select min(home_price) min_home_price, home_community from readyBuilt group by home_community) b on b.home_community = oc.community
INNER JOIN readyBuilt rb ON oc.community = rb.home_community 
INNER JOIN rb_locations rbl ON rb.home_location = rbl.locationId 
INNER JOIN readyBuilt rb1 ON oc.community = rb1.home_community
WHERE rb1.isDeleted = 0
AND oc.home_status = 1 
 GROUP BY oc.id, oc.name, oc.community, oc.mapLocation, oc.locationLabel, oc.logo 
 ORDER BY oc.name;

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如果您可以用简单的英语上传您的3个表定义和总体目标，即您想要实现什么，而不是从如何开始解决问题开始，那么我可以帮助您进行更简单的查询。

在您的第二次查询中，当您没有分组依据时，您只得到一行，因为您正在为整个表选择minhome_price

当您添加GroupBy时，您将获得每个id、每个姓名、每个社区等的minhome_价格

您需要更改子查询以仅获取外部查询当前行的minhome_价格。将子查询视为一个函数，该函数根据与外部查询中的列匹配的某些参数返回值

我还怀疑您的子查询中只需要一个表——一个包含价格的表。其他表可能在那里为您提供位置分组，因此它们属于外部查询。试着让外部查询在没有最小价格的情况下工作，直到最后

例如

选择id、名称等。。。 , 从p中选择minprice 其中p.id=oc.id 作为明普莱斯 来自我们的社区 内部连接等。。。 分组方式

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正如其他答案所示，有很多方法可以实现这一点，比如连接而不是子查询。每种方法都有优点和缺点，除非性能是一个问题，否则只需使用最容易理解和维护的方法。

您还需要包括数据库模式。当您可以在外部查询上只显示minhome_价格时，您可以使用为什么需要子查询。简单地看，您可能需要使用派生表而不是子查询。但正如ssaltman所说，我们确实需要更多关于您试图实现的目标以及您的db模式的详细信息。@user979331您是否有机会使用一些示例数据、表结构和最终期望的结果编辑您的文章？更好的是，创建一个sql数据库来处理数据。