SQL Server 根据分隔符依次截取每个子字符串

--根据分隔符截取字符串 'Chris,Nancy,Alvin,Sherman,Erick,Josie,Sonia,Joanna'
--法1 根据CHARINDEX函数递归求出分隔符在字符串中出现的位置,之后根据分隔符截取字符串
--注意:下例中当字符内没有分隔符时会陷入死循环
DECLARE @str VARCHAR(1000)='Chris,Nancy,Alvin,Sherman,Erick,Josie,Sonia,Joanna';
WITH TEMP AS (
SELECT CHARINDEX(',',@str,0) ROWNUM
UNION ALL
SELECT CASE WHEN CHARINDEX(',',@str,ROWNUM+1)=0 THEN len(@str)+1 ELSE CHARINDEX(',',@str,ROWNUM+1) END ROWNUM
FROM TEMP
WHERE ROWNUM