查找每行的最大列名称和值

Question

我需要找到分数最低的问题。 数据包含Yes和No点的列，用于计算总分。 我不仅需要知道最低分，还要知道哪个问号的得分最低。 分数全部存储在单个记录中。

最好的方法是什么？ 我尝试了一个PIVOT表，但是它变得混乱了。

这是一些示例数据：

SELECT 1 AS Score_ID, 28.0 AS YesPtsGivenI, 2.0 AS NoPtsGivenI, 30.0 AS YesPtsGivenII, 0.0 AS NoPtsGivenII, 29.0 AS YesPtsGivenIII, 0.0 AS NoPtsGivenIII, 25.0 AS YesPtsGivenIV, 3.0 AS NoPtsGivenIV, 30.0 AS YesPtsGivenV, 0.0 AS NoPtsGivenV, 29.0 AS YesPtsGivenVI, 0.0 AS NoPtsGivenVI 
INTO #FS 
UNION 
SELECT 2 AS Score_ID, 27.0 AS YesPtsGivenI, 3.0 AS NoPtsGivenI, 29.0 AS YesPtsGivenII, 1.0 AS NoPtsGivenII, 28.0 AS YesPtsGivenIII, 0.0 AS NoPtsGivenIII, 28.0 AS YesPtsGivenIV, 0.0 AS NoPtsGivenIV, 30.0 AS YesPtsGivenV, 0.0 AS NoPtsGivenV, 29.0 AS YesPtsGivenVI, 0.0 AS NoPtsGivenVI  
UNION 
SELECT 3 AS Score_ID, 28.0 AS YesPtsGivenI, 2.0 AS NoPtsGivenI, 30.0 AS YesPtsGivenII, 0.0 AS NoPtsGivenII, 27.0 AS YesPtsGivenIII, 2.0 AS NoPtsGivenIII, 28.0 AS YesPtsGivenIV, 0.0 AS NoPtsGivenIV, 28.0 AS YesPtsGivenV, 2.0 AS NoPtsGivenV, 28.0 AS YesPtsGivenVI, 1.0 AS NoPtsGivenVI 
UNION 
SELECT 4 AS Score_ID, 30.0 AS YesPtsGivenI, 0.0 AS NoPtsGivenI, 29.0 AS YesPtsGivenII, 1.0 AS NoPtsGivenII, 29.0 AS YesPtsGivenIII, 0.0 AS NoPtsGivenIII, 28.0 AS YesPtsGivenIV, 0.0 AS NoPtsGivenIV, 30.0 AS YesPtsGivenV, 0.0 AS NoPtsGivenV, 28.0 AS YesPtsGivenVI, 1.0 AS NoPtsGivenVI 
UNION 
SELECT 5 AS Score_ID, 29.0 AS YesPtsGivenI, 1.0 AS NoPtsGivenI, 30.0 AS YesPtsGivenII, 0.0 AS NoPtsGivenII, 28.0 AS YesPtsGivenIII, 1.0 AS NoPtsGivenIII, 28.0 AS YesPtsGivenIV, 0.0 AS NoPtsGivenIV, 29.0 AS YesPtsGivenV, 1.0 AS NoPtsGivenV, 29.0 AS YesPtsGivenVI, 0.0 AS NoPtsGivenVI 
UNION 
SELECT 6 AS Score_ID, 30.0 AS YesPtsGivenI, 0.0 AS NoPtsGivenI, 28.0 AS YesPtsGivenII, 2.0 AS NoPtsGivenII, 29.0 AS YesPtsGivenIII, 0.0 AS NoPtsGivenIII, 27.0 AS YesPtsGivenIV, 1.0 AS NoPtsGivenIV, 30.0 AS YesPtsGivenV, 0.0 AS NoPtsGivenV, 29.0 AS YesPtsGivenVI, 0.0 AS NoPtsGivenVI 
UNION 
SELECT 7 AS Score_ID, 39.0 AS YesPtsGivenI, 0.0 AS NoPtsGivenI, 30.0 AS YesPtsGivenII, 0.0 AS NoPtsGivenII, 29.0 AS YesPtsGivenIII, 0.0 AS NoPtsGivenIII, 26.0 AS YesPtsGivenIV, 2.0 AS NoPtsGivenIV, 30.0 AS YesPtsGivenV, 0.0 AS NoPtsGivenV, 29.0 AS YesPtsGivenVI, 0.0 AS NoPtsGivenVI 

这是我的分数查询：

SELECT 
FS.YesPtsGivenI / (FS.YesPtsGivenI + FS.NoPtsGivenI) AS Q1, 
FS.YesPtsGivenII / (FS.YesPtsGivenII + FS.NoPtsGivenII) AS Q2, 
FS.YesPtsGivenIII / (FS.YesPtsGivenIII + FS.NoPtsGivenIII) AS Q3, 
FS.YesPtsGivenIV / (FS.YesPtsGivenIV + FS.NoPtsGivenIV) AS Q4, 
FS.YesPtsGivenV / (FS.YesPtsGivenV + FS.NoPtsGivenV) AS Q5, 
FS.YesPtsGivenVI / (FS.YesPtsGivenVI + FS.NoPtsGivenVI) AS Q6 
FROM #FS FS 

我需要从上面的结果中确定哪个问题对于表中的每一行具有最低分数。

Answer 1

我无法真正关注您的查询或示例数据 - 因为我无法确切地说出“得分”是什么。 但这个问题最简单的答案是apply 。 我可以推测类似的东西：

select fs.*, v.*
from #fs fs cross apply
     (select top (1) val, which
      from (values (FS.YesPtsGivenI / (FS.YesPtsGivenI + FS.NoPtsGivenI), 'Q1'), 
                   (FS.YesPtsGivenII / (FS.YesPtsGivenII + FS.NoPtsGivenII), 'Q2'), 
                   (FS.YesPtsGivenIII / (FS.YesPtsGivenIII + FS.NoPtsGivenIII), 'Q3'), 
                   (FS.YesPtsGivenIV / (FS.YesPtsGivenIV + FS.NoPtsGivenIV), 'Q4'), 
                   (FS.YesPtsGivenV / (FS.YesPtsGivenV + FS.NoPtsGivenV), 'Q5'), 
                   (FS.YesPtsGivenVI / (FS.YesPtsGivenVI + FS.NoPtsGivenVI), 'Q6')
           ) v(val, which)
       order by val desc
      ) v;

Answer 2

这可能有点太聪明了一半，但它完成了工作。

使用您的基本查询，我忽略了结果集以使排序更容易，然后应用SELECT TOP 1 WITH TIES技巧以获得每个Score_ID的最低分数。

SELECT TOP 1 WITH TIES
    Score_ID,
    QName,
    QScore
FROM
    (
        SELECT Score_ID,
        FS.YesPtsGivenI / (FS.YesPtsGivenI + FS.NoPtsGivenI) AS Q1, 
        FS.YesPtsGivenII / (FS.YesPtsGivenII + FS.NoPtsGivenII) AS Q2, 
        FS.YesPtsGivenIII / (FS.YesPtsGivenIII + FS.NoPtsGivenIII) AS Q3, 
        FS.YesPtsGivenIV / (FS.YesPtsGivenIV + FS.NoPtsGivenIV) AS Q4, 
        FS.YesPtsGivenV / (FS.YesPtsGivenV + FS.NoPtsGivenV) AS Q5, 
        FS.YesPtsGivenVI / (FS.YesPtsGivenVI + FS.NoPtsGivenVI) AS Q6 
        FROM #FS FS 
    ) AS q
UNPIVOT
    (
        QScore
        FOR QName IN (Q1, Q2, Q3, Q4, Q5, Q6)
    ) unp
ORDER BY RANK() OVER (PARTITION BY Score_ID ORDER BY QScore ASC)

结果：

+----------+-------+----------+
| Score_ID | QName |  QScore  |
+----------+-------+----------+
|        1 | Q4    | 0.892857 |
|        2 | Q1    | 0.900000 |
|        3 | Q3    | 0.931034 |
|        4 | Q6    | 0.965517 |
|        5 | Q3    | 0.965517 |
|        6 | Q2    | 0.933333 |
|        7 | Q4    | 0.928571 |
+----------+-------+----------+