I need to find the question with the lowest score. The data has columns for Yes and No points which are used to calculate a total score. I not only need to know the lowest score but also which question number had the lowest score. The scores are all stored in a single record.
What's the best way to go about this? I tried a PIVOT table but that got messy.
Here's some sample data:
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
Here's my score query:
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
I need to identify from the above result which Question had the lowest score for each row in the table.
I can't really follow your query or sample data -- because I can't quite tell what the "score" is. But simplest answer to the question is apply
. I can speculate something like:
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;
This might be a little too clever by half, but it gets the job done.
Using your base query, I unpivoted the result set to make sorting easier, then applied the SELECT TOP 1 WITH TIES
trick to get the lowest score by each Score_ID
.
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)
Results:
+----------+-------+----------+
| 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 |
+----------+-------+----------+
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