mysql5.7 报错1055:Expression #1 of SELECT list is not in GROUP BY clause and contains non

cd /etc/mysql/mysql.conf.d/  

（有的mysql配置文件是 /etc/my.cnf ，而我的Ubuntu16.04 + mysql 5.7.24 下 mysql配置文件是这里 /etc/mysql/mysql.conf.d/)

在[mysqld] 下添加：

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