我試圖在代碼[i] [價格]大於現有值時更新現有[價格]。我很感謝你的幫助。僅在現有值小於新值時更新
MYDATABASE設置ANSI_NULLS ON 組QUOTED_IDENTIFIER ON GO --This扳機被附接到Price_Import表所以,當這表獲取新的價格值觸發將更新MYDATABASE菜單項表此類物品的價格,其是在MYDATABASE
ALTER TRIGGER [dbo].[trgafterinsertinto_Price_Import_Table] ON [dbo].[Price_Import]
AFTER INSERT
AS
BEGIN
SET NOCOUNT ON;
UPDATE [dbo].[MenuItem]
SET [Price] = i.[Price] ,[Cost] = i.[Cost]
FROM Inserted i
WHERE MenuItem.PLU = i.PLU
DELETE FROM dbo.Price_Import
END
此代碼更新了成本和價格的主要項目表,但我需要幫助它修改爲僅更新價格當新的價格比舊的大。