Pivot table with non-cardinal values

Question

I have a table that looks like

Test   Reader    Result
1      John      1.6
1      Jack      5.2
2      Ursula    2.5
3      Albert    3.0
2      Jack      5         


        

Answer 1

See my comment above. I tried to convert for your table (T1):

 WITH TX AS (SELECT TEST, READER, RESULT, ROW_NUMBER() OVER (PARTITION BY TEST ORDER BY READER) AS RN
            FROM T1
            )
SELECT T0.TEST
    , TT1.READER AS READER_1
    , TT1.RESULT AS RESULT_1
    , TT2.READER AS READER_2
    , TT2.RESULT AS RESULT_2
    , TT3.READER AS READER_3
    , TT3.RESULT AS RESULT_3
FROM (SELECT DISTINCT TEST FROM T1) AS T0
LEFT JOIN TX TT1 ON T0.TEST = TT1.TEST AND TT1.RN=1
LEFT JOIN TX TT2 ON T0.TEST = TT2.TEST AND TT2.RN=2
LEFT JOIN TX TT3 ON T0.TEST = TT3.TEST AND TT3.RN=3;