mysql5.7之後使用 group by 會出現 only_full_group_by

 mysql5.7之後使用 group by 會出現 only_full_group_by

### Error querying database.  Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'user.id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

解決方案

# 編輯/etc/my.cnf
$ vi /etc/my.cnf

# /etc/my.cnf 文件最後添加下面的命令
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

# 重啓mysql
$ service mysqld restart