[Err] 1055 - Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated colum

摘要: centos 上面 mysql 5.7.16

今天视频平台有一个统计查询失败

SELECT
s.schoolName,
s.classname,
count(s.resourceId) AS count
FROM
tbl_school_class_lens_info s,
tbl_player_statistics p
WHERE
s.resourceId = p.resourceId
GROUP BY
s.resourceId

[Err] 1055 - Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated colum

官方说法
https://dev.mysql.com/doc/refman/5.7/en/group-by-handling.html
查询mysql 相关mode

[root@localhost home]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1147
Server version: 5.7.16 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>
mysql>
mysql> show variables like '%sql_mode%'
-> ;
+---------------+-------------------------------------------------------------------------------------------------------------------------------------------+
| Variable_name | Value                                                                                                                                     |
+---------------+-------------------------------------------------------------------------------------------------------------------------------------------+
| sql_mode      | 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 |
+---------------+-------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

mysql> select version(), @@sql_mode;
+-----------+-------------------------------------------------------------------------------------------------------------------------------------------+
| version() | @@sql_mode                                                                                                                                |
+-----------+-------------------------------------------------------------------------------------------------------------------------------------------+
| 5.7.16    | 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 |
+-----------+-------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

mysql> exit

发现 里面 有 ONLY_FULL_GROUP_BY ， 所有将其去掉

sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'

[root@localhost ~]# cat /etc/my.cnf
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html 
[mysqld]
sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'
#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
#skip-grant-tables
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

[client]
socket =/var/lib/mysql/mysql.sock

然后重启mysql

[root@localhost ~]# service mysqld stop
Redirecting to /bin/systemctl stop  mysqld.service

[root@localhost ~]#
[root@localhost ~]# service mysqld start
Redirecting to /bin/systemctl start  mysqld.service
[root@localhost ~]#