关于mysql 8.0版本运行sql出现[Err] 1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and ...

      最近mysql数据库版本又5.x.xx换成了mysql8.0.20,执行SQL语句的时候,出现错[Err] 1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'information_schema.PROFILING.SEQ' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by;

    经过查询以及自己亲身试验解决方案如下两点(本人是win10系统,其他系统操作方法一样):

 1.零时方案

cmd,登录mysql(执行mysql -uroot -p....),成功后

一.查看sql_mode

select @@sql_mode;

查询结果为:

ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION

二、去掉ONLY_FULL_GROUP_BY,重新设置值:

set @@sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

ok,此时零时生效,关闭cmd窗口后失效

2.永久方案

打开mysql安装目录,找到my.ini配置文件,在文件最后(其他位置应该也可以)添加:

sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION

保存后,CMD,重启mysql :  先执行  net stop mysql  再执行net start mysql   至此,再执行SQL问题消失。

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