为什么加了group by 就报错了
错误截图：
2 回答
我也遇到这个问题，不过是mysql配置的问题，我把解决办法贴出来给遇到同样错误的人作一些参考
ERROR 1055 (42000): Expression #3 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.s.type_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
修改设置
SET sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));
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