mysql 新版本出现group by 语句不兼容问题
[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
解决过程
1. 查看数据库设置的 sql_mode
# 进入mysql命令行 select @@global.sql_mode;
查询出来的值为:
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
我们只要去掉ONLY_FULL_GROUP_BY 这个设置就好。
2.去掉ONLY_FULL_GROUP_BY 临时
修改my.cnf 配置文件,删掉only_full_group_by这一项,如果没有设置,直接根据上面的查询结果去掉ONLY_FULL_GROUP_BY
增加到配置文件,重启mysql即可。
如果需要临时修改一个库的可以直接执行语句:(mysql命令行中)
set sql_mode =‘STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION‘;
但以上方式只是临时的,重启mysql后会恢复原来的模式,产生错误
3.去掉ONLY_FULL_GROUP_BY 永久 在配置文件 /etc/my.cnf 或自己的mysql配置文件中
[mysqld] sql_mode =STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
重启mysql即可
mysql5.7执行sql语句提示Expression #1 of ORDER BY clause is not in GROUP BY