如何用SQL Server 2008中的空白/空值替換重複的單元格？

Question

請參閱附件圖片。我試圖刪除前5列中的重複單元格。

程序拆分列是唯一的列女巫唯一條目，我希望這保持不變，然後第2列和第3列的5列顯示空白或空..這是可行的嗎？

非常感謝您的幫助:)

Answer 1

爲此，您可以使用左連接和ROW_NUMBER窗函數。 請在運行此查詢之前檢查列的正確性。

SELECT T2.[Operation cancelled within 28 days] 
     ,T2.[Number of new patients seen] 
     ,T2.[Number of follow up patients seen] 
     ,T2.[Readmission Rate] 
     ,T2.[2 Week Target] 
     ,T1.[Procedure Split] 
FROM 
    (SELECT DISTINCT [Operation cancelled within 28 days] 
        ,[Procedure Split] 
        ,ROW_NUMBER() OVER(ORDER BY NUM) AS RN FROM Your_table) T1 

LEFT JOIN 

    (SELECT * FROM (SELECT DISTINCT [Operation cancelled within 28 days] 
            ,[Number of new patients seen] 
            ,[Number of follow up patients seen] 
            ,[Readmission Rate] 
            ,[2 Week Target] 
            ,ROW_NUMBER() OVER(ORDER BY A) AS RN FROM Your_table) X 
    WHERE RN=1) T2 
ON T1.RN = T2.RN