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知道为什么我在这里得到“列类型不匹配 [Analysis.ASCo]”吗?光标突出显示第 5 行中的第二个“分析”。

select
[Analysis].[Project],
[Analysis].[Borehole],
[Analysis].[Depth],
([Analysis].[ASCu]+(([Analysis].[ASCo]*30500)/5630)) as [Equivalent],
[Nama C Boreholes].[Elevation],
([Nama C Boreholes].[Elevation]-[Analysis].[Depth]) as [Sample_Elevation]
from
[Analysis]
inner join [Nama C Boreholes]
on [Analysis].[Project]=[Nama C Boreholes].[Project]
and [Analysis].[Borehole]=[Nama C Boreholes].[Borehole]
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