Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column xxxxx

Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'XXX' which is

1. 方法一、把你要分组的字段设置成设成primary key 或者 unique NOT NULL。

2.方法二、关闭sql_mode=ONLY_FULL_GROUP_BY

# 查询当前设置
SELECT @@GLOBAL.sql_mode;

# 关闭--对于后来新建的有效
set @@sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';

# 对当前数据库有效
SET sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';

# 全局
SET @@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';


# 原来设置
set @@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';

3.方法三、设置my.cnf配置文件

在[mysql]和[mysqld]下面加上

[client]
port = 3306
socket = /tmp/mysql.sock
default-character-set = utf8mb4

[mysql]
prompt="MySQL [\d]> "
no-auto-rehash

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

[mysqld]
port = 3306
socket = /tmp/mysql.sock
sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'

basedir = /usr/local/mysql
datadir = /data/mysql
pid-file = /data/mysql/mysql.pid
user = mysql
bind-address = 0.0.0.0
server-id = 1

init-connect = 'SET NAMES utf8mb4'
character-set-server = utf8mb4

skip-name-resolve
#skip-networking
back_log = 300

max_connections = 330
max_connect_errors = 6000
open_files_limit = 65535
table_open_cache = 128
max_allowed_packet = 500M
binlog_cache_size = 1M
max_heap_table_size = 8M
tmp_table_size = 16M

read_buffer_size = 2M
read_rnd_buffer_size = 8M
sort_buffer_size = 8M
join_buffer_size = 8M
key_buffer_size = 8M

thread_cache_size = 8

query_cache_type = 1
query_cache_size = 8M
query_cache_limit = 2M

ft_min_word_len = 4

log_bin = mysql-bin
binlog_format = mixed
expire_logs_days = 7

log_error = /data/mysql/mysql-error.log
slow_query_log = 1
long_query_time = 1
slow_query_log_file = /data/mysql/mysql-slow.log

performance_schema = 0
explicit_defaults_for_timestamp

# sql语句忽略大小写
lower_case_table_names = 1

skip-external-locking

default_storage_engine = InnoDB
#default-storage-engine = MyISAM
innodb_file_per_table = 1
innodb_open_files = 500
innodb_buffer_pool_size = 64M
innodb_write_io_threads = 4
innodb_read_io_threads = 4
innodb_thread_concurrency = 0
innodb_purge_threads = 1
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 2M
innodb_log_file_size = 32M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 120

bulk_insert_buffer_size = 8M
myisam_sort_buffer_size = 8M
myisam_max_sort_file_size = 10G
myisam_repair_threads = 1

interactive_timeout = 28800
wait_timeout = 28800

[mysqldump]
quick
max_allowed_packet = 500M

[myisamchk]
key_buffer_size = 8M
sort_buffer_size = 8M
read_buffer = 4M
write_buffer = 4M

4.原理(摘自官网)

​​https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sqlmode_only_full_group_by​​

ONLY_FULL_GROUP_BY

拒绝选择列表，HAVING条件或ORDER BY列表引用非聚合列的查询，这些 列既不在GROUP BY子句中命名，也不在功能上依赖于（唯一确定的） GROUP BY列。

从MySQL 5.7.5开始，默认的SQL模式包括 ONLY_FULL_GROUP_BY。（在5.7.5之前，MySQL不检测功能依赖性，ONLY_FULL_GROUP_BY默认情况下不启用。有关5.7.5之前行为的描述，请参阅MySQL 5.6参考手册。）

标准SQL的MySQL扩展允许HAVING子句中的引用 到选择列表中的别名表达式。在MySQL 5.7.5之前，启用 ONLY_FULL_GROUP_BY 禁用此扩展，因此要求 HAVING使用非混淆表达式编写子句。从MySQL 5.7.5开始，这个限制被取消，因此HAVING无论是否ONLY_FULL_GROUP_BY启用，该子句都可以引用别名 。

5. MySQL 8.0 问题

​​Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.​​ 需要改成这个：

sql-mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION'