SQL 逗号分隔将一行拆成多行

select PID, SUBSTRING(a.KOrderID,number,CHARINDEX(',',a.KOrderID+',',number)-number) as KOrderID from  TB a,master..spt_values 

where    number >=1 and number<=len(a.KOrderID)      and type='p'     and substring(','+a.KOrderID,number,1)=',')