MySQL查询的时候出现 Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggre报错

Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggre …后面一大堆

出错就是这样
我们可以在网上看到很多解释

MySQL 5.7.5及以上功能依赖检测功能。如果启用了ONLY_FULL_GROUP_BY
SQL模式（默认情况下），MySQL将拒绝选择列表，HAVING条件或ORDER BY列表的查询引用在GROUP
BY子句中既未命名的非集合列，也不在功能上依赖于它们。（5.7.5之前，MySQL没有检测到功能依赖关系，默认情况下不启用ONLY_FULL_GROUP_BY。

大概的意思是你现在的MySQL版本高于5.7.5，因此MySQL多了一个依赖检测功能，导致了这个报错
如果之前用得好好的，现在环境换了之后报错，那就是因为之前用的是5.7.5以前的MySQL，现在的版本是5.7.5以后的

大多数解答都是这样的：
在查询里面输入

select @@global.sql_mode

查出来结果为

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

就是因为有了开头的那个ONLY_FULL_GROUP_BY，导致报错，我们要把ONLY_FULL_GROUP_BY去掉

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';

有些人到这里原本就结束了

但是

如果你的MySQL重启之后，你再重新查询，ONLY_FULL_GROUP_BY依然还是在，并没有删除成功

这时候你就要到MySQL的配置文件里面改了（window环境下是my.ini文件，Linux环境下是my.cnf）

我们这里写Linux环境下的解决办法：
如果Linux系统里面找不到my.cnf，可以用这个命令

find / -name my.cnf

这时候会出现

/usr/local/mysql/storage/ndb/test/crund/config_samples/my.cnf
/usr/local/mysql/rapid/plugin/group_replication/tests/mtr/my.cnf
/usr/local/mysql/mysql-test/suite/rpl_ndb/my.cnf
/usr/local/mysql/mysql-test/suite/rpl/my.cnf
/usr/local/mysql/mysql-test/suite/rpl/extension/bhs/my.cnf
/usr/local/mysql/mysql-test/suite/ndb_memcache/my.cnf
/usr/local/mysql/mysql-test/suite/ndb_big/my.cnf
/usr/local/mysql/mysql-test/suite/ndb_binlog/my.cnf
/usr/local/mysql/mysql-test/suite/ndb_team/my.cnf
/usr/local/mysql/mysql-test/suite/ndb_ddl/my.cnf
/usr/local/mysql/mysql-test/suite/ndbcluster/my.cnf
/usr/local/mysql/mysql-test/suite/ndb/my.cnf
/usr/local/mysql/mysql-test/suite/ndb_rpl/my.cnf
/usr/local/mysql/mysql-test/suite/federated/my.cnf
/etc/my.cnf

我们进入最后那个文件
然后在

[mysqld]

下面找个地方写

sql-mode="NO_UNSIGNED_SUBTRACTION,NO_ENGINE_SUBSTITUTION"

保存重启MySQL，就解决了！！！

Linux环境下开启与关闭MySQL

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