mysql 5.7报1055错误的解决方法
今天由mysql 5.6升级到5.7的时候，遇到一个group by的错误： Expression #2 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column ‘trade.create_time’ which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by 原来，执行下面语句发现，默认的sql_mode修改了，变成：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，而5.6版默认是：NO_ENGINE_SUBSTITUTION 1 show VARIABLES like 'sql_mode' ; 没办法，需要去掉ONLY_FULL_GROUP_BY，则执行 set global sql_mode= 'STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO