解决方法一:

SET sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));

优点:不用重启mysql

缺点:重启mysql后还会出现标题错误

SELECT @@global.sql_mode;

查询全局的

@@session.sql_mode 当前回话的

上面的只是修改当前回话,需要修改全局的sql_mode

解决方法二

在my.cnf中修改

[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

注:sql_mode值用select @@sql_mode;查询出来后,将ONLY_FULL_GROUP_BY去掉剩余的值

优点:重启mysql 一次性解决问题

缺点:需要重启mysql

可以结合上述两种方案,来避免重启mysql服务,又能避免需要马上重启mysql

注:

my.cnf linux路径默认是/etc/my.cnf

在window下是my.ini

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