SQL Server / SSMS - 将nvarchar转换为float时出错

Question

我已针对Temp_Calc_1检查了Temp_Calc_2，并且它们都具有相同的列数据类型（float，nvarchar(255)），并且在读取表格时的顺序相同。当我尝试在空Temp_Calc_2上运行时，我收到错误：

  

将nvarchar转换为float

时出错

在INSERT INTO dbo.Temp_Calc_2

行

USE MfgMetrics                                  

INSERT INTO dbo.Temp_Calc_2         
    SELECT 
        zps.[Plant], [Work Center], 
        [Scheduled start Date], [SCHEDULE START TIME],
        [SCHEDULED FINISHED DATE], [SCHEDULED FINISHED TIME],
        [MATERIAL NUMBER], [MATERIAL DESCRIPTON],
        [ORDER NUMBER], [ORDER TYPE], 
        [PLANNED QUANTITY], [PLANNED QTY - PROD UN],
        [DELIVERED QTY], [DELIVERED QTY - PROD UN],
        [RemainingQty(BUn)], [REMAINING QTY - Prod Un],
        [COMMITED QTY], [COMMITED QTY  - PROD UN], [UOM],
        [STORAGE LOCATION], [COMMENTS],
        [RATE QUANTITY], [RATE QUANTITY - PROD UN], [RATE HOUR],
        [OPERATING EFFIECIENCY], [UNIT],
        [STD UNITS / HR], [STD UNITS / HR - PROD UN], [UOM2],
        [ORDER STATUS], [ACTUAL START DATE], [ACTUAL START TIME],
        [MRP CONTROLLER], [CREATED ON], [TIME CREATED],
        [CHANGED ON], [TIME CHANGE], 
        [ORDER TEXT LINES], [ORDER TEXT 2nd LINE], [FileDate],
        scf.[OQ_RxnTime_(mins)], scf.[RunDurThreshold_(hrs)],
        CASE 
           WHEN (zps.[MATERIAL NUMBER] LIKE '%.%') 
              THEN zps.[MATERIAL NUMBER] 
           WHEN ISNUMERIC(zps.[MATERIAL NUMBER]) = 1 
              THEN CAST(CAST(zps.[MATERIAL NUMBER] AS INT) AS NVARCHAR(255))
           ELSE zps.[MATERIAL NUMBER] 
        END As [Material],
        (CAST(CAST(zps.[ORDER NUMBER] AS INT) AS NVARCHAR(255)) + '_' + CAST(CAST(zps.[PLANNED QUANTITY] AS INT) AS NVARCHAR(255))) AS Order_Quantity,
        scf.[OQ_RxnTime_(mins)] * zps.[STD UNITS / HR] / 60 AS OQWindow
    FROM 
        Temp_Calc_1 zps 
    INNER JOIN
        SAWorkCenters swc ON zps.Plant = swc.Plant
                          AND zps.[Work Center] = swc.WCGroup
    INNER JOIN
        SchedAttCalcFactors scf ON zps.Plant = scf.[Plant Code]
    ORDER BY 
        zps.Plant, zps.[Work Center], zps.[ORDER NUMBER], zps.FileDate 
GO