如何在表中更新或插入CTE。 SQL

Question

好傢伙我已經試圖插入一個名爲dbo.filemetadata.Source列下面的代碼的結果，這裏是代碼：

WITH CTE AS 
(
    SELECT 
    rn, 
    ROW_NUMBER() OVER (PARTITION BY rn ORDER BY (SELECT NULL)) filepartno, 
    Split.a.value('.', 'VARCHAR(100)') AS filepart 
    FROM 
    (
    SELECT ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) rn, 
    CAST ('<M>' + REPLACE(FilePath, '\', '</M><M>') + '</M>' AS XML) AS String 
    FROM FileMetadata 
) AS A 
    CROSS APPLY String.nodes ('/M') AS Split(a) 
) 
SELECT FilePart AS A 

FROM CTE C 
    JOIN (SELECT MAX(filepartno) maxfilepartno, rn 
     FROM CTE 
     GROUP BY rn) C2 ON C.rn = C2.rn AND C.filepartno = C2.maxfilepartno-1; 

Answer 1

您可以結合INSERT和CTE選擇與正常查詢：

WITH CTE AS 
(
.... 
) 
INSERT INTO ... 
SELECT FilePart AS A 

FROM CTE .... 

更新的UPDATE聲明

WITH CTE AS 
(
.... 
) 
UPDATE FileMetaData 
SET SOURCE = FilePart 

FROM FileMetaData INNER JOIN CTE ON ....