SQL Server 交叉表查询——case

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：

SQL Server 交叉表查询——case

access代码：

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

SQL server代码：

1 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
2 from dbo.LandUndertake inner join
3                       dbo.Appraiser ON dbo.LandUndertake.quarterID=dbo.appraiser.quarterID and dbo.landundertake.appraiserID=DBO.Appraiser.appraiserID
4 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：

SQL Server 交叉表查询——case