MySQL与sql_mode = only_full_group_by不兼容 [英] MySQL incompatible with sql_mode=only_full_group_by

问题描述

我有以下查询（更新如下）：

I have the following query (UPDATED SEE BELOW):

SELECT 

i0_.id AS id_0, 
i0_.address AS address_1, 
i1_.name AS name_2, 
c2_.name AS name_3, 
c3_.code AS code_4, 
l4_.iso AS iso_5, 
c5_.id AS id_6, 
c6_.name AS name_7, 
i7_.identifier AS identifier_8 

FROM institutions i0_ 
LEFT JOIN institution_languages i1_ ON (i1_.institution_id = i0_.id) 
LEFT JOIN countries c3_ ON (c3_.id = i0_.country_id) 
LEFT JOIN country_languages c2_ ON (c2_.country_id = c3_.id) 
LEFT JOIN country_spoken_languages c8_ ON (c8_.country_id = c3_.id) 
LEFT JOIN cities c5_ ON (c5_.id = i0_.city_id) 
LEFT JOIN city_languages c6_ ON (c6_.city_id = c5_.id) 
LEFT JOIN languages l4_ ON (l4_.id = i1_.language_id) 
LEFT JOIN institution_types i7_ ON (i0_.institution_type_id = i7_.id) 

WHERE c8_.is_primary = 1 
AND c8_.language_id = l4_.id 
AND c2_.language_id = 546 
AND i7_.identifier = "work_place" 
GROUP BY id_6 #here is the issue...

更新查询

UPDATED Query

SELECT 
i0_.id AS id_0, 
i0_.address AS address_1, 
i1_.name AS name_2, 
c2_.name AS name_3, 
c3_.code AS code_4, 
c4_.name AS name_5, 
i5_.identifier AS identifier_6 

FROM institutions i0_ 

LEFT JOIN institution_languages i1_ ON (i1_.institution_id = i0_.id) 
LEFT JOIN countries c3_ ON (c3_.id = i0_.country_id) 
LEFT JOIN country_languages c2_ ON (c2_.country_id = c3_.id AND c2_.language_id = ?) 
LEFT JOIN country_spoken_languages c6_ ON (c6_.country_id = c3_.id AND c6_.language_id = ? AND c6_.is_primary = ?) 
LEFT JOIN city_languages c4_ ON (c4_.city_id = i0_.city_id) 
LEFT JOIN institution_types i5_ ON (i0_.institution_type_id = i5_.id) 

WHERE i5_.identifier = ? 
GROUP BY i0_.city_id

此查询的GROUP_BY存在问题，我不确定该如何解决：

This query is having a problem with GROUP_BY which I am not sure how to solve:

1055-SELECT列表的表达式＃1不在GROUP BY子句中，并且包含非聚合列'database.i0_.id'，这不是

在功能上取决于GROUP BY子句中的列；这是
与sql_mode = only_full_group_by不兼容

1055 - Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'database.i0_.id' which is not

functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

我知道可以通过设置only_full_group_by轻松解决此问题，但是我可以对我的查询做什么使其正常运行，而不必修改服务器上的MySQL设置？

I know this can be easily solved by setting off the only_full_group_by but what can i do to my query to make it work properly and not having to modify the MySQL setup on my server?

推荐答案

如果不想更改sql_mode = only_full_group_by

if you want not change the sql_mode=only_full_group_by

您可以简单地向不属于分组依据的列添加一个聚集函数（例如min（）或max（）

you can simply add an aggegation function to the column not involved in group by ( eg min() or max()

（在以前的版本中，该列的结果是不可预测的。通过这种方式，您可以分配一个规则来获取这些列的值）

(in the previuos versione the result for this column was impredictable. in this way you assign a rule for get the value for these columns )

SELECT 
  i0_.id AS id_0, 
  min(i0_.address AS) address_1, 
  min(i1_.name) AS name_2, 
  min(c2_.name )AS name_3, 
  min(c3_.code) AS code_4, 
  min(c4_.name) AS name_5, 
  min(i5_.identifier) AS identifier_6 

FROM institutions i0_ 

LEFT JOIN institution_languages i1_ ON (i1_.institution_id = i0_.id) 
LEFT JOIN countries c3_ ON (c3_.id = i0_.country_id) 
LEFT JOIN country_languages c2_ ON (c2_.country_id = c3_.id AND c2_.language_id = ?) 
LEFT JOIN country_spoken_languages c6_ ON (c6_.country_id = c3_.id AND c6_.language_id = ? AND c6_.is_primary = ?) 
LEFT JOIN city_languages c4_ ON (c4_.city_id = i0_.city_id) 
LEFT JOIN institution_types i5_ ON (i0_.institution_type_id = i5_.id) 

WHERE i5_.identifier = ? 
GROUP BY i0_.city_id

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