php - 如何安排我正在使用组 concat 的数据的输出？

Question

我想以降序排列我的数据输出这是我的代码：

$result3 = mysql_query("SELECT grade1.Semester, curriculum.SCode, curriculum.SDesc, curriculum.Lec, curriculum.Lab, curriculum.Units, curriculum.Prereq, GROUP_CONCAT(grade1.Grade1) as Grade1 , students.StudNo, grade1.YearLevel
FROM students 
    INNER JOIN grade1 
        ON students.StudNo = grade1.G1StudNo 
    INNER JOIN curriculum
        ON curriculum.SCode = grade1.G1SCode
         WHERE StudNo = '$id'
GROUP BY StudNo,SCode ")

这是输出： 。

我想要发生的是 5,5,1 .. 当我使用 group_concat 时我该怎么做？

Answer 1

查看GROUP_CONCAT上的文档：

GROUP_CONCAT(grade1.Grade1 ORDER BY grade1.Grade1 DESC)