如何獲取包含SQL Server中第一行號的重複行？

Question

我寫下面的查詢來檢索重複的客戶在SQL Server中使用Row_Number（）。

Cust_PKID ---------------+ CustomerID ----------------- + MobileNo 
1      | A00001      | 9000477444 
2      | A00002      | 9000477444 
3      | A00003      | 9000477444 

查詢： -

Select TMP.CustID 
From 
(
    Select CustomerID CustID, 
     Row_Number() Over(Partition By MobileNo Order By (Select Null)) As RowNo 
    From dbo.Customers 
) TMP 
Where TMP.RowNo > 1 

輸出： -

Cust_PKID ---------------+ CustomerID ----------------- + MobileNo  
2      | A00002      | 9000477444 
3      | A00003      | 9000477444 

我怎樣才能檢索到的記錄，包括在SELECT語句中第一RowNo記錄？

Answer 1

您正在尋找COUNT() OVER()窗口功能不ROW_NUMBER

Select TMP.CustID 
From 
(
    Select CustomerID CustID, 
     COUNT(1) Over(Partition By MobileNo) As RowNo 
    From dbo.Customers 
) TMP 
Where TMP.RowNo > 1 

這將使所有重複MobileNo記錄