mysql group by 过滤字段 只能在SELECT 后面出现,不能写其他字段 报错解决 关键字 sql_mode=only_full_group_by

1:报错 关键字 sql_mode=only_full_group_by

mysql> select uuid,ip,count(*) from dbname_report.t_client_ips group by uuid limit 1;

ERROR 1055 (42000): Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'dbname_report.t_client_ips.ip' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

2:查看模式

mysql> select @@global.sql_mode

-> ;

+------------------------------------------------------------------------------------------------------------------------+

| @@global.sql_mode |

+------------------------------------------------------------------------------------------------------------------------+

| STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION |

+------------------------------------------------------------------------------------------------------------------------+

1 row in set (0.01 sec)

3:设置模式

mysql> set @@global.sql_mode = 'STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION'

-> ;

Query OK, 0 rows affected, 2 warnings (0.00 sec)

mysql> select uuid,ip,count(*) from dbname_report.t_client_ips group by uuid limit 1;

ERROR 1055 (42000): Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'dbname_report.t_client_ips.ip' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

mysql> select @@global.sql_mode;

4:查看

+--------------------------------------------+

| @@global.sql_mode |

+--------------------------------------------+

| STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION |

+--------------------------------------------+

1 row in set (0.00 sec)

5:执行还是报错

6:修改数据库配置文件

cat /etc/my.cnf

[mysqld]

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

7:重启数据库,可以解决