which is not functionally dependent on columns in GROUP BY clause； sql_mode=only_full_group_by

这个问题是数据库设置了only_full_group_by模式：

错误的sql:

SELECT content,teacherId FROM tb_test GROUP BY teacherId;

正确的sql:(因为一个teacherId 会对应多个content的情况所以content要加上any_value(）)

SELECT any_value(content) AS content,teacherId FROM tb_test GROUP BY teacherId;