取消计算列值

Question

SELECT  

P.EmployeeId,
(P.Amount*1)*T.RegularHours as RegularEarnings
,(P.Amount*1.5)*T.OTHours as OvertimeEarnings 
,(P.Amount*2)*T.DOTHours as DoubleOvertimeEarnings
,((P.Amount*1)*T.RegularHours)+((P.Amount*1.5)*T.OTHours )+((P.Amount*2)*T.DOTHours)+((SELECT ISNULL(SUM(AMOUNT),0) FROM EmployeeEarning WHERE EmployeeId=T.EmployeeId)) as GrossPay
FROM TimeSheet  as T
INNER JOIN PayInformation as P ON T.EmployeeId=P.EmployeeId 

上面是我的select语句，它以列格式返回收入。我想unpivot我的结果表，以便每个employeeId有两列，一列是赚取类型，第二列是赚取金额。

我已经完成了简单的univote

select unpvt.car_id, unpvt.attribute, unpvt.value
from @cars c
unpivot ( 
 value 
 for attribute in (Make, Model, Color)
) unpvt

但现在卡住了，因为我必须取消选择在select语句中计算的表值。

我尝试了更多内容，这是我的最新代码

SELECT unpvt.EmployeeId, unpvt.Earning, unpvt.Amount
FROM 
(SELECT    
P.EmployeeId,
(P.Amount*1)*T.RegularHours as RegularEarnings
,(P.Amount*1.5)*T.OTHours as OvertimeEarnings 
,(P.Amount*2)*T.DOTHours as DoubleOvertimeEarnings
,((P.Amount*1)*T.RegularHours)+((P.Amount*1.5)*T.OTHours )+((P.Amount*2)*T.DOTHours)+((SELECT ISNULL(SUM(AMOUNT),0) FROM EmployeeEarning WHERE EmployeeId=T.EmployeeId)) as GrossPay
FROM TimeSheet  as T
INNER JOIN PayInformation as P ON T.EmployeeId=P.EmployeeId )as c
unpivot ( 
Amount
for Earning in (RegularEarnings,OvertimeEarnings,DoubleOvertimeEarnings)
)unpvt

现在我收到错误

The type of column "OvertimeEarnings" conflicts with the type of other columns specified in the UNPIVOT list.