星球的眼睛 发表于 2024-8-23 15:32:16

MySQL:this is incompatible with sql_mode=only_full_group_by

错误场景

偶然间,遇到数据库重复数据,需要将数据举行分组,并取出其中一条来展示,这时就需要用到group by语句。
但是,如果mysql是高版本,当执行group by时,select的字段不属于group by的字段的话,sql语句就会报错。报错信息如下:
   Expression #1 of SELECT list is not in GROUP BY clause and contains
nonaggregated column ‘数据库名.表名.字段名’ which is not functionally dependent
on columns in GROUP BY clause; this is incompatible with
sql_mode=only_full_group_by
解决方案

   这是暂时的解决方案,要终极解决需要修改设置文件
SET @@global.sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';
SET sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

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