sql 处理以字符隔开的字符串（类似split）

CREATE PROCEDURE dbo.Vip_SendMails
@userids varchar(MAX),
@fromwho varchar(50),
@subject varchar(300),
@c varchar(MAX),
@split varchar(2)
AS
BEGIN
while(charindex(@split,@userids)<>0) 
begin 

insert into VipMail (fromwho,towho,subject,content) 
values (@fromwho,substring(@userids,1,charindex(@split,@userids)-1),@subject,@c)

set @userids = stuff(@userids,1,charindex(@split,@userids),'')
end 
END
GO
--调用 注意：格式要是“xxx,sss,fff,hhh,”最后一个也要加上
exec dbo.Vip_SendMails 'sada,qweqw,asdsadasds,iioo,kkkk,dddd,wqwqweqweq,','sssss','测试标题','内容内容',','