我要为列而非行即透视SQL Server上2010
Owner_ID Pet
--------------------
1 Cat
1 Dog
1 Hamster
2 Cow
2 Sheep
3 Dog
将它转换为每个员工返回前三名宠物
Owner_ID Pet1 Pet2 Pet3
-------------------------------------
1 Cat Dog Hamster
2 Cow Sheep null
3 Dog null null
宠物的名字来自查找表可以有任意数量的宠物但我只想返回前三名。
这是我的查询:
SELECT Owner,Pet1, Pet2,Pet3
FROM
(select distinct OwnerID as Owner,glcom.Value as Pets
from Owner ,OwnerPets ,Pet
where Pet.Type='Furry'
and OwnerPets.OwnerID = OwnerID.OwnerID
and OwnerPets.PetID = Pet.PetID) AS SourceTable
PIVOT
(
Max(Pets)
FOR Pets IN (Pet1, Pet2,Pet3)
) AS PivotTable;
遗憾的是它只为每一行返回null ...所以我看到的输出是
Owner_ID Pet1 Pet2 Pet3
-------------------------------------
1 null null null
2 null null null
3 null null null
希望这是一个普遍的问题,必须有人已经解决了它。
感谢
跆拳道是SQL Server 2010的?最新版本是2008 R2。 – 2010-06-24 22:48:08
注意:我的答案假设您在跟踪Brent Ozar调用2008 R2 SQL Server 2010! http://www.brentozar.com/archive/2009/02/sql-server-2010-features-leaked/ – 2010-06-25 08:36:21
:)是的,它的确如此。 – sfomate 2010-06-28 16:28:29