如何根據列值在單個列中顯示多個表的列？

Question

我有這樣一個表：

現在我想編寫一個查詢，可以顯示這些數據如下：

我怎樣才能做到這一點？有人可以幫我嗎？

Answer 1

SELECT Grade AS ISG, 
      P1AR, P1SM1, P1SM2, 
      P2AR, P2SM1, P2SM2, 
      P3AR, P3SM1, P3SM2 
    FROM 
    (
      SELECT Grade, 
        col = 'P' + CAST(Process AS NVARCHAR) +col, 
        value 
      FROM yourTable 

      CROSS APPLY 
      (
       VALUES 
       ('AR', AR), 
       ('SM1', SM1), 
       ('SM2', SM2) 
      ) c(col, value) 
    ) d 
    PIVOT 
    (
      MAX(value) 
      FOR col IN (P1AR, P1SM1, P1SM2, 
         P2AR, P2SM1, P2SM2, 
         P3AR, P3SM1, P3SM2) 
    ) piv 

Answer 2

另一種方式來寫這個查詢：

SELECT 
a.Grade AS ISG, 
a.AR AS P1AR, 
a.SM1 AS P1SM1, 
a.SM2 AS P1SM2, 

b.AR AS P2AR, 
b.SM1 AS P2SM1, 
b.SM2 AS P2SM2, 

c.AR AS P3AR, 
c.SM1 AS P3SM1, 
c.SM2 AS P3SM2  
FROM yourTable a 
INNER JOIN yourTable b 
ON  a.Grade = b.Grade 
INNER JOIN yourTable c 
ON  a.Grade = c.Grade 

where a.Process = 1 and 
     b.Process = 2 and 
     c.Process = 3