本文介绍了解决MySQL中出现的错误[Err]1055，该错误通常发生在使用GROUP BY子句时，涉及非聚合列未出现在GROUP BY中。文章提供了修改MySQL配置文件my.cnf的方法来解决这一问题。
错误信息：[Err] 1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'lsmsp.tbd.VALUE' which is not functionally dependent
on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
解决办法：
在linux 下找到mysql配置文件my.cnf，并在其中添加配置项：sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
详情请见：
http://www.th7.cn/db/mysql/201701/222836.shtml
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