Mysql问题only_full_group_by

mysql查询报错： ORDER BY clause is not in GROUP BY..this is incompatible with sql_mode=only_full_group_by

在用mysql执行如下查询的时候：

select * from fruits GROUP BY s_id,f_name;

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报错信息如下：

[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

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错误的原因是我mysql版本是5.7的，使用如下语句查询可知

select @@sql_mode;

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里面默认设置了

sql_mode=only_full_group_by

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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

在windows系统里面，直接修改my.ini文件；

[mysqld]下

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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到此mysql配置文件的完整配置如下：