sql中某一個字段內容為用逗號分割的字符串轉換成多條數據並附Id

WITH testtb2 AS 
(
　　SELECT 
　　　　A.ID, A.VALUE, CHARINDEX(',', A.VALUE) AS STA, CHARINDEX(',', A.VALUE) - 1 AS LENS
　　FROM @table1 AS A 
　　UNION ALL
　　SELECT 
　　　　ID, VALUE, CHARINDEX(',', VALUE, STA + 1) AS STA, CHARINDEX(',', VALUE, STA + 1) - STA - 1 AS LENS
　　FROM  [表名] AS testtb2_2
　　WHERE (STA <> 0)
)
SELECT TOP (100) PERCENT SUBSTRING(VALUE, STA - LENS, LENS) AS OrderRequest, ID 
FROM testtb2 AS testtb2_1
WHERE (STA <> 0)
ORDER BY VALUE

原文鏈接：https://www.cnblogs.com/MoMo1002/p/6594832.html