随机获取显示数据到下拉列表

Question

基本上我希望在下拉列表中随机显示项目，任何功能都可以使用它吗？

输出

一个

b

c

预期输出（可以是任何但不仅是 abc）

b

一个

c

或

c

一个

b

或

任何

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asp:Label ID="Label3" Text=' ' Runat="server"

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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 按 Newid()" 排序

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()  

更新

测试：

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