sql替换text或Ntext类型

--定义替换的字符串
declare @s_str varchar(80),@d_str varchar(80)
select @s_str='/KuWeb/' --要替换的字符串
,@d_str='/'--替换成的字符串

declare @p varbinary(16),@postion int,@rplen int
declare @GatherId int
DECLARE @tempCur CURSOR
SET @tempCur=CURSOR LOCAL FOR
select id from ChannelContent
OPEN @tempCur
FETCH NEXT FROM @tempCur into @GatherId
 WHILE @@FETCH_STATUS = 0
 BEGIN
 
  select @p=textptr(Content),@rplen=len(@s_str),@postion=charindex(@s_str,Content)-1 from ChannelContent
  where id=@GatherId
  while @postion>0
  begin
  updatetext ChannelContent.Content @p @postion @rplen @d_str
  select @postion=charindex(@s_str,Content)-1 from ChannelContent
  end
 FETCH NEXT FROM @tempCur into @GatherId
 END
CLOSE @tempCur