Mysql报错this is incompatible with sql_mode=only_full_group_by

遇到的问题:

查询时报错信息

1
Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'xxx.b.step_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

原因:

MySQL 5.7.5及以上功能依赖检测功能。如果启用了ONLY_FULL_GROUP_BY SQL模式(默认情况下),MySQL将拒绝选择列表
HAVING条件或ORDER BY列表的查询引用,在GROUP BY子句中既未命名的非集合列,也不在功能上依赖于它们。

解决方法:

在mysql上执行    bash select @@global.sql_mode,可看到结果中存在ONLY_FULL_GROUP_BY SQL

修改mysql配置文件my.cnf,在末尾添加 

sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION 
重启mysql sudo systemctl restart mysqld 


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