sql中某一个字段内容为用逗号分割的字符串转换成多条数据

效果：

 SQL语句

DECLARE @table1 TABLE (
    Code NVARCHAR(50), --班别
    NAME NVARCHAR(50)  --名字
)
INSERT INTO @table1 VALUES ('大班', '张三,李四，王五')
INSERT INTO @table1 VALUES ('中班', '小美,小可')
INSERT INTO @table1 VALUES ('小班', '小甜')
SELECT * FROM @table1;

WITH Temp AS (
        SELECT A.Code, A.NAME
            , CHARINDEX(',', A.NAME + ',') AS STA
            , CHARINDEX(',', A.NAME + ',') - 1 AS LENS
        FROM @table1 A
        UNION ALL
        SELECT Code, NAME
            , CHARINDEX(',', NAME + ',', STA + 1) AS STA
            , CHARINDEX(',', NAME + ',', STA + 1) - STA - 1 AS LENS
        FROM Temp
        WHERE STA <> 0
    )
SELECT Code, SUBSTRING(NAME, STA - LENS, LENS) AS Name
FROM Temp
WHERE STA <> 0
ORDER BY Code