use tempdb
go
--测试数据
declare @s varchar(1000)
set @s='ak47,mp5,1,23'
/*要求输出结果
S
----
ak47
mp5
1
23
*/
--3种方法对比:
--1.[朴实]动态Exec方法:
declare @s1 varchar(1000)
set @s1=right(replace(','+@s,',',''' as S union select '''),len(replace(','+@s,',',''' as S union select '''))-12)+''''
exec(@s1)
--2.[变通]表交叉方法:
select replace(reverse((left(s,charindex(',',s)))),',','') as S from(
select r,reverse(left(@s,r))+',' as s
from(
select (select count(*) from sysobjects where name=t.name ) as r
from sysobjects t
)a where r=len(@s)
and left(@s+',',r+1) like '%,'
)t order by r
--3.[高级]XML方法:
（本文来源于图老师网站，更多请访问http://m.tulaoshi.com/bianchengyuyan/）DECLARE @idoc int;
DECLARE @doc xml;
set @doc=cast('RootitemS'+replace(@s,',','/S/itemitemS')+'/S/item/Root' as xml)
EXEC sp_xml_preparedocument @Idoc OUTPUT, @doc
SELECT * FROM OPENXML (@Idoc, '/Root/item',2)
WITH (
[S] varchar(10)
)
