mysql使用group by分组时出现错误ERROR 1055 (42000): Expression #1 of SELECT list is not in GROUP BY clause and

查看sql_model参数命令：
SELECT @@SESSION.sql_mode;

解决方法：
命令行输入
set sql_mode =’STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION’;