解决大于5.7版本mysql的分组报错Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'userinfo.
前言:
借鉴网址:https://blog.csdn.net/fansili/article/details/78664267
原因:
MySQL 5.7.5和up实现了对功能依赖的检测。如果启用了only_full_group_by SQL模式(在默认情况下是这样),那么MySQL就会拒绝选择列表、条件或顺序列表引用的查询,这些查询将引用组中未命名的非聚合列,而不是在功能上依赖于它们。(在5.7.5之前,MySQL没有检测到功能依赖项,only_full_group_by在默认情况下是不启用的。关于前5.7.5行为的描述,请参阅MySQL 5.6参考手册。)
执行以下个命令,可以查看 sql_mode 的内容:
mysql> SHOW SESSION VARIABLES;
mysql> SHOW GLOBAL VARIABLES;
mysql> select @@sql_mode; 可见session和global 的sql_mode的值都为:
ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION 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
解决:
set global sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';
set session sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';
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