Mysql Group by 报错:1055 - Expression #1GROUP BY this is incompatible with sql_mode=only_full_group_by

原文链接:https://blog.csdn.net/loveliness_peri/article/details/88051316 

是由于默认的 MySQL 配置中 sql_mode 配置了 only_full_group,需要 GROUP BY 
中包含所有 在 SELECT 中出现的字段。

only_full_group_by说明:
only_full_group_by :使用这个就是使用和oracle一样的group 规则, 
select的列都要在group中,或者本身是聚合列(SUM,AVG,MAX,MIN) 才行,
其实这个配置目前个人感觉和distinct差不多的,所以去掉就好

 

SELECT * FROM 表名称 GROUP BY 字段

1055 - Expression #1 of SELECT list is not in GROUP BY clause and contains 
nonaggregated column 'XXX' which is not functionally dependent on columns 
in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

出现问题原因:sql_mode里面多了:ONLY_FULL_GROUP_BY

使用 SQL 语句可以查询这个配置:

select @@sql_mode;

解决方法:在配置文件添加对应设置:(就是执行上面的查询sql_mode语句;去掉ONLY_FULL_GROUP_BY即可)

sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION

Mysql Group by 报错:1055 - Expression #1GROUP BY this is incompatible with sql_mode=only_full_group_by_第1张图片

 

 

 

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