本文介绍了解决MySQL中Err1055错误的方法。该错误与sql_mode=only_full_group_by设置有关，当ORDER BY子句包含不在GROUP BY子句中的非聚合列时触发。通过修改/etc/my.cnf文件中的sql_mode设置为'NO_ENGINE_SUBSTITUTION'并重启Mysql服务即可解决。
1、Err1055，出现这个问题往往是在执行sql语句时候，在最后一行会出现这个问题。
[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
解决方法：
在 /etc/my.cnf 文件里加上如下：
sql_mode='NO_ENGINE_SUBSTITUTION'
然后，重启Mysql服务就可以解决了！
[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
解决方法：
在 /etc/my.cnf 文件里加上如下：
sql_mode='NO_ENGINE_SUBSTITUTION'
然后，重启Mysql服务就可以解决了！
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