SQL Server 交叉表查询 case

时间:2014-06-04 02:04来源:网络整理作者:网络点击: 次

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今天下午忙于将access数据库中的交叉表转到SQL server数据库中，在SQL server中，不支持transfrom方法，查找相关资料，找到使用case方法进行转换

代码如下所示：

表landundertake结构如下所示：

表appraiser结构如下所示：

access代码：

代码如下:

 
TRANSFORM First(Landundertake.valuerId) AS valuerId之First 
SELECT Appraiser.quarterId, Landundertake.landCode 
FROM Landundertake INNER JOIN Appraiser ON (Landundertake .valuerId = Appraiser.valuerID) AND (Landundertake .quarterId = Appraiser.quarterId) 
GROUP BY Appraiser.quarterId, Landundertake .landCode 
PIVOT Landundertake .valuerGrade; 

SQL server代码：

代码如下:

 
select dbo.appraiser.quarterID,dbo.landUndertake.landcode,case dbo.landUndertake.appraiserGrade when 'appraiserID1' then dbo.landundertake.appraiserID else null END as appraiserID,case dbo.landUndertake.appraiserGrade when 'appraiserID2' then dbo.landundertake.appraiserID else null END as appraiserID1 
from dbo.LandUndertake inner join 
dbo.Appraiser ON dbo.LandUndertake.quarterID=dbo.appraiser.quarterID and dbo.landundertake.appraiserID=DBO.Appraiser.appraiserID 
Group by dbo.appraiser.quarterID,dbo.landUndertake.landcode,dbo.landundertake.appraiserGrade,dbo.landundertake.appraiserID 

交叉表查询结果如下所示：