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我的报告是前段时间有人告诉我的，它显示了一年中“评级”和“结果”列的数据。

目前脚本正在使用 Case 语句来实现这一点，但是我相信这就是 Pivot Function 的用途，并且可以节省一些代码行。任何人都可以帮助我更改逻辑以使用枢轴功能吗？当前逻辑：

    Select
EmployeeID, 
Employee, 
--Datetype, 
EmpGroupID, 
PA, 
EmpLevel, 
ObjectiveName as Objective, 
Objectiveid AS Objectiveid,
Weighting,
ReportingYear,

max(Case When r.DateType = 'M' 
          and Month(r.StartDate) = 1 
          and r.result IS NOT NULL
         Then r.Result

         When r.DateType = 'M' 
          and Month(r.StartDate) = 1 
          and r.result IS NULL 
      and r.rating is NOT NULL THEN COALESCE(rtovr.ratingShortDesc,rt.ratingShortDesc)
    Else null
     END) as Value_January_1,

MAX(Case When r.DateType = 'M' 
          and Month(r.StartDate) = 1
         Then dbo.udfGetRating(case when r.RatingOverride is null            
                                    then r.Rating 
                               else r.RatingOverride 
                               end) + '|' + CAST(UserOverride AS CHAR(1)) + '|' + rt.ratingShortDesc
         Else null
     END) as Rating_January_1,


From #tblResults R

WHERE r.datetype IN ('M','Y')

...在选择中一直遵循该案例逻辑到 12 月。

表 #tblResult 上的示例数据：

EmployeeID Employee Datetype EmpGroupID PA EmpLevel ObjectiveName Objectiveid Weighting RPTYear ObjSortOrder ObjGrpSortOrder Result Rating RatingOverride startdate UserOverride 
552940 test Q 664 Sr Rep 1 Overall Rating -1 1 2012 0 0 2 2.00 NULL 2012-01-01 0
552940 test Q 664 Sr Rep 1 Overall Rating -1 1 2012 0 0 2.39 2.00 NULL 2012-04-01 0
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