sql-server - SQL Server(T-sql)テーブルを下から上に更新

Question

テーブルの一時（F4）の結果を下から上に更新しようとしています。それは、すべての行をwhile-loopし、更新は順序付けできますか?

ありがとう！

Answer 1

が正の整数であると仮定するROWと、使用できます ( demo )

WITH T1 AS
(
SELECT *, 
       MIN(CASE WHEN F4 <> 0 THEN CONCAT(FORMAT([ROW],'D10'),[F4]) END) 
         OVER (ORDER BY [ROW] ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING) AS M
FROM temp

)
SELECT *, 
       CAST(SUBSTRING(M,11,11) AS INT) AS val
FROM T1
ORDER BY [ROW]

更新したい場合F4は、使用できます

WITH T1 AS
(
SELECT *, 
      MIN(CASE WHEN F4 <> 0 THEN CONCAT(FORMAT([ROW],'D10'),[F4]) END) 
           OVER (ORDER BY [ROW] ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING) AS M
FROM temp

)
UPDATE T1
SET F4 = COALESCE(SUBSTRING(M,11,11),0);