mysql (_mysql_exceptions.OperationalError) (1055, "Expression #1 of SELECT list is not in GROUP BY clause
sudo gedit /etc/mysql/my.cnf
在打开的my.cnf文件中添加
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
保存，退出
重启mysql：/etc/init.d/mysql restart
登录mysql：mysql -u root -p
mysql ->select @@sql_mode;
验证sql_mode的值是否改变.
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