轉置鍵值對SQL表

Question

我有一個由幾列組成的表，包括鍵值對。所以，想象一下：

BookID, Key, Value 
MyBook, Price, 19.99 
MyBook, ISBN, 987878495793 
MyBook, Pages, 354 
MyBook2, ...., .... 
MyBook2, ...., .... 

我需要進入這個格式：

BookID, Price, ISBN, Pages 
MyBook, 19.99, 987878495793, 354 
MyBook2,.....,.............,.... 

即調換細胞 - 我將如何在SQL這樣做呢？

Answer 1

這樣的事情？

SELECT 
    BookID, Price, ISBN, Pages 
FROM 
(
    SELECT BookID, Key, Value FROM yourTable 
) 
    AS SourceTable 
PIVOT 
(
    SUM(Value) FOR Key IN (Price, ISBN, Pages) 
) 
    AS PivotTable 
ORDER BY 
    BookID 

http://technet.microsoft.com/en-us/library/ms177410(SQL.105).aspx