Ntext字段拆分处理

if exists (select * from dbo.sysobjects where id = object_id(N@#[dbo].[p_split]@#) and OBJECTPROPERTY(id, N@#IsProcedure@#) = 1)drop procedure [dbo].[p_split]GO

/*--Ntext字段拆分处理

 按指定的分隔符,将 ntext 字段拆分成多条记录 注意:处理过程固定以名为id的int型字段为主键 如果不满足这个条件,则要对应的修改存储过程

--邹建 2004.07--*/

/*--调用示例

 --测试数据 create table tb(id int identity(1,1),content ntext) insert tb select @#001,002@# union all select @#001,002,003,004,005,006,007,008,009,010@# union all select replicate(@#001,002,003,004,005,006,007,008,009,010@#,8000)

  --调用存储过程,进行拆分 exec p_split @#tb@#,@#content@#,@#,@#,@#id=3@#

 drop table tb--*/

create proc p_split@tbname sysname,  --要处理的表名@fdname sysname,  --text/ntext字段名@splitchar nvarchar(10)=@#,@#,--拆分的字符串分隔符@where nvarchar(1000)=@#@#--要处理的记录的条件asif isnull(@splitchar,@#@#)=@#@# set @splitchar=@#,@#

declare @s nvarchar(4000)set @s=@#create table #t(id int identity(1,1),re nvarchar(50))declare @id int,@ptr varbinary(16)declare @s nvarchar(4000),@i int,@j intdeclare @sp1 varchar(10),@step int

select @sp1=reverse(@splitchar),@step=len(@splitchar)

declare tb cursor local for select id,s=substring([@#+@fdname+@#],1,4000)from [@#+@tbname+@#]where datalength([@#+@fdname+@#])>0 @#+case isnull(@where,@#@#) when @#@# then @#@#  else @# and(@#+@where+@#)@# end+@#

open tb fetch tb into @id,@swhile @@fetch_status=0begin set @i=1 while @s<>@#@#@#@# begin  if len(@s)=4000   select @j=4000-charindex(@sp1,reverse(@s))    ,@i=@i+@j+@step    ,@s=left(@s,@j)  else    select @i=@i+4000,@j=len(@s)  insert #t select substring(@s,id,charindex(@splitchar,@s+@splitchar,id)-id)  from 序数表  where id<=@j+@step and charindex(@splitchar,@splitchar+@s,id)-id=0  select @s=substring([@#+@fdname+@#],@i,4000)  from [@#+@tbname+@#]  where id=@id end

 fetch tb into @id,@sendclose tbdeallocate tbselect * from #t@#exec sp_executesql @s ,N@#@splitchar nvarchar(10)@# ,@splitchargo

原文转自：http://www.ltesting.net