mySql中Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggre的问题

概述报错信息 Expression 2 of SELECT list is not in GROUP BY clause and contains nonaggregated column ‘a.id’ 报错信息

Expression #2 of SELECT List is not in GROUP BY clause and contains
nonaggregated column ‘a.ID’ which is not functionally
dependent on columns in GROUP BY clause; this is incompatible with
sql_mode=only_full_group_by

产生原因

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。（5.7.5之前，MysqL没有检测到功能依赖关系，默认情况下不启用ONLY_FulL_GROUP_BY。有关5.7.5之前的行为的说明，请参见“MysqL 5.6参考手册”。）

解决方法

select @@global.sql_mode

结果为

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

执行

set @@global.sql_mode=’STRICT_TRANS_tableS,NO_ENGINE_SUBSTITUTION’;

成功解决

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