vba訪問顯示與最短日期重複的數據

Question

有什麼辦法找到最小（創建日期）並從訪問查詢中刪除它？

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Answer 1

您可以簡單地使用MIN（）函數MIN（）日期選擇記錄。

SELECT Item_Number, Order_Number, Order_Line_Number, MIN(Creation_Date) 
FROM *tblName* 
GROUP BY Item_Number, Order_Number, Order_Line_Number 

或者您可以在'創建日期'列上使用MAX（）函數來排除具有最小日期的記錄。

SELECT Item_Number, Order_Number, Order_Line_Number, MAX(Creation_Date) 
FROM *tblName* 
GROUP BY Item_Number, Order_Number, Order_Line_Number 

或者如果您最初提到的真的想從MIN（）日期刪除MS Access表中的記錄然後使用下面的查詢。

DELETE **tbl_A.*** FROM 
*tblName tbl_A* INNER JOIN *tblName tbl_B* 
WHERE 
tbl_A.Item_Number = tbl_B.Item_Number 
AND 
tbl_A.Order_Number = tbl_B.Order_Number 
AND 
tbl_A.Order_Line_Number = tbl_B.Order_Line_Number 
AND 
tbl_A.Creation_Date = tbl_B.MIN(Creation_Date)