SQL Server 中怎么交叉表查询case

SQL Server 中怎么交叉表查询case，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。

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：复制代码 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：复制代码 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

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