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這是SQL查詢。我們如何定義SQL查詢的字段上的驗證規則MS Access 2007
SELECT Assets.Asset_ID,
Assets.Name,
Assets.[Purchase Price],
Assets.Salvage,
Assets.[Life Span],
Assets.[Accumulated Depreciation],
(Assets.[Purchase Price]-Assets.Salvage)/Assets.[Life Span] AS Current_Depreciation,
Current_Depreciation+Assets.[Accumulated Depreciation] AS Total_Depreciation,
Assets.[Purchase Price]-Total_Depreciation AS Net_Value
FROM Assets;
由於折舊總額從購買價格,打撈和壽命得到的(計算),我不希望它超過購買價格。即總折舊< =購買價格。如果是這樣的話,總折舊必須等於購買價格。 如何在MS ACCESS 2007的SQL查詢本身中執行此操作,因爲VBA無法用於在查詢中執行此操作。