SQL服務器：透視功能錯誤

Question

，我發現了以下錯誤：

Msg 102, Level 15, State 1, Line 2
Incorrect syntax near '('.

當執行此查詢：

SELECT 
    'Average Total Comp' AS AverageTotalComp, 
    [2016], [2015], [2014] 
FROM 
    (SELECT 
     DATEPART(yyyy, [Fiscal Year End Date]), 
     [Total Compensation ($)] 
    FROM 
     dbo.MDexec e) AS SourceTable 
PIVOT 
    (AVG([Total Compensation ($)]) 
    FOR DATEPART(yyyy, [Fiscal Year End Date]) 
     IN ([2016], [2015], [2014])) AS PivotTable; 

我試圖同時使用YEAR和DATEPART。錯誤是引用第二個DATEPART上的開頭括號。

Answer 1

你需要一個別名分配給DATEPART表達和使用您的數據透視子句中：

SELECT 'Average Total Comp' AS AverageTotalComp, 
[2016], [2015], [2014] 
FROM (SELECT datepart(yyyy,[Fiscal Year End Date]) AS dp, 
[Total Compensation ($)] FROM dbo.MDexec e) 
AS SourceTable 
PIVOT (
avg([Total Compensation ($)]) 
FOR dp 
IN ([2016], [2015], [2014])) AS PivotTable; 

Answer 2

你不需要Pivot做到這一點。試試這種方式

SELECT AverageTotalComp = 'Average Total Comp', 
     [2016] = Avg(case when year([Fiscal Year End Date]) = 2016 then [Total Compensation ($)] end), 
     [2017] = Avg(case when year([Fiscal Year End Date]) = 2017 then [Total Compensation ($)] end), 
     [2018] = Avg(case when year([Fiscal Year End Date]) = 2018 then [Total Compensation ($)] end) 
FROM dbo.MDexec e 
Where [Fiscal Year End Date] >= '2015-01-01' 
    and [Fiscal Year End Date] < '2019-01-01'