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Question

如果我將不得不例如在一些表：

[Speed] [Ram] [Whatever] [Other] 
     S1 R1  W1  O1 
     S2 R2  W2  O2 
     S3 R3  W3  O3 

而且我想都這樣。

[Chr]  [Value] 
Speed  S3 
Ram  R3 
Whatever W3 
Other  O3 

---

所以我寫下面的代碼：

SELECT value 
FROM 
    (SELECT speed, ram 
    FROM pc where code=3) p 
UNPIVOT 
    (value FOR xxx IN 
     (speed, ram) 
)AS unpvt 

問題是，當我想補充我的第二列[CHR]

SELECT value, chr <---- This does not work 
     FROM 
      (SELECT speed, ram, whatever, other 
      FROM pc where code=3) p 
     UNPIVOT 
      (value FOR xxx IN 
       (speed, ram) 
     )AS unpvt 
UNPIVOT 
      (chr FOR zzz IN 
       (speed, ram, whatever, other) 
     )AS unpvt 

我不知道怎麼加此代碼的另一列。請任何建議。

Answer 1

你在找？

SELECT Chr, Value 
    FROM 
(
    SELECT t.* 
    FROM pc t 
    WHERE code = 3 
) s 
UNPIVOT 
(
    Value FOR Chr IN (Speed, Ram, Whatever, Other) 
) p 

輸出：

 
|  CHR | VALUE | 
-------------------- 
| Speed | S3 | 
|  Ram | R3 | 
| Whatever | W3 | 
| Other | O3 | 

這裏是SQLFiddle演示