随机获取显示数据到下拉列表

Question

基本上我希望在dropdownlist中随机显示项目，任何函数都可以使用吗？

输出

一

B'/ P>

C

预期输出（可以是任何但不仅仅是abc）

B'/ P>

一

C

OR

C

一

B'/ P>

OR

任何

---

asp：Label ID =“Label3”Text ='＆lt;％＃DataBinder.Eval（Container.DataItem，“Question”）％＆gt; 'Runat =“server”

---

选择* from（SELECT [r1] AS [Option] FROM [ExerciseTable] WHERE（[Question] = @Question）

UNION SELECT [r2] AS [Option] FROM [ExerciseTable] WHERE（[Question] = @Question）UNION

SELECT [r3] AS [Option] FROM [ExerciseTable] WHERE（[Question] = @Question AND

[r3]！= null））t由Newid（）命令“

Answer 1

您可以使用Newid()获取随机顺序

SELECT *
FROM   (SELECT [r1] AS [Option]
        FROM   [ExerciseTable]
        WHERE  ( [Question] = @Question )
        UNION
        SELECT [r2] AS [Option]
        FROM   [ExerciseTable]
        WHERE  ( [Question] = @Question )
        UNION
        SELECT [r3] AS [Option]
        FROM   [ExerciseTable]
        WHERE  ( [Question] = @Question
                 AND [r3] != NULL )) t
ORDER  BY Newid()  

<强>更新

FOR TEST：

代码：

SELECT *
FROM   (SELECT 'a' AS col
        UNION
        SELECT 'b' AS col
        UNION
        SELECT 'c' AS col) t
ORDER  BY Newid()  

第一次

第二次