sql/coldfusion顯示重複行

Question

鑑於下表，我想實現這個邏輯到我的查詢中：如果2個UPC是相同的，則顯示具有最高PRODUCTID值的行。所以，在我的表這將是第2行。

 
PRODUCTID  UPC 
100    01434 
101    01434 
102    05877 

這裏是我的代碼，我需要

<cfquery name="GetData" datasource="#Application.ds#" dbtype="ODBC" username="#Application.UserName#" password="#Application.Password#"> 
Select PRODUCTID, UPC 
FROM Products 
Where ... 
</cfquery> 

Answer 1

SELECT MAX(PRODUCTID) AS PRODUCTID, UPC 
FROM Products 
GROUP BY UPC 
HAVING COUNT(UPC) > 1 

Answer 2

嘗試是這樣的查詢幫助...

SELECT MAX(ProductId) as Id, Upc 
FROM Products 
GROUP BY Upc 
HAVING COUNT(*) > 1 

http://archive.msdn.microsoft.com/SQLExamples/Wiki/View.aspx?title=DuplicateRows