PIVOT未按预期执行

Question

对不起，以前不清楚的问题;希望我能重新开始......

我有这样的数据：

entityid name     stringvalue 
----------- -------------------- -------------------- 
1   ShortDescription  Coal 
1   LongDescription  BlackCoal 
1   ShortDescription  Gold 
1   LongDescription  WhiteGold 
1   ShortDescription  Steel 
1   LongDescription  StainlessSteel 

而这个查询：

select * 
from 
(
    select entityid, name, stringvalue as stringvalue 
    from mytable 
) as d 
pivot 
(
    min([stringvalue]) 
    for [name] in ([ShortDescription],[LongDescription]) 
) 
as p 

生产这种输出：

entityid ShortDescription LongDescription 
-------- ---------------- --------------- 
1  Coal    BlackCoal 

有人能告诉我为什么其他行不在制作中？我期待看到：

entityid ShortDescription LongDescription 
-------- ---------------- --------------- 
1  Coal    BlackCoal 
1  Gold    WhiteGold 
1  Steel   StainlessSteel 

Answer 1

答案竟然是这样的：

select * 
from 
(
    select entityid, [name], stringvalue as stringvalue 
    from mytable 
) as d 
pivot 
(
    min(stringvalue) 
    for [name] in ([ShortDescription],[LongDescription]) 
) 
as p 

:)

的缺陷是，输入表应该有1，1，2， 2，3，3分别为entityid行。

M