SQL服务器：透视功能错误

Question

，我发现了以下错误：

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

当执行此查询：

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; 

我试图同时使用YEAR和DATEPART。错误是引用第二个DATEPART上的开头括号。

Answer 1

你需要一个别名分配给DATEPART表达和使用您的数据透视子句中：

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做到这一点。试试这种方式

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'