获得全班学生的职位

Question

以下是我的代码。 我想要做的是让每个学生的位置都基于班级的整体原始分数。 我使用'sum（assessment）'来总结整个疮。

我的错误是'[Err] 1111 - 无效使用群组功能'

SELECT 
    SUM(assessment) AS raw_score,
    student.id,
    student.fname,
    student.oname,
    student.lname,
    class.class,
    FIND_IN_SET(
    SUM(assessment),
        (
            SELECT
                GROUP_CONCAT(
                    DISTINCT sum(assessment) 
                    ORDER BY
                sum(assessment)  DESC
                )
            FROM
                all_exam_records
        )
    ) AS position
FROM
    all_exam_records
INNER JOIN student ON student.id = all_exam_records.student_name
INNER JOIN class ON class.id = student.class
WHERE class.id = '440'
GROUP BY class.id