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sqlserver2008 拆分字符串

　　本文标签：sqlserver,字符串

--说明:例如,将下列数据

id id_value
-----------------
1 aa,bb
2 aa,bb,cc
3 aaa,bbb,ccc

--转换成以下的格式
id id_value
-----------------
1 aa
1 bb
2 aa
2 bb
2 cc
3 aaa
3 bbb
3 ccc

--代码-------------------------------------------GO
复制代码 代码如下:

create table ta
(
id int,
id_value varchar(30)
)

insert into ta
select 1,aa,bb union all
select 2,aa,bb,cc union all
select 3,aaa,bbb,ccc

select
top 4000 ix = identity(int, 1, 1)
into #tb
from sys.objects a, sys.objects b

select
id,
id_value = substring(id_value,ix,charindex(,,id_value + ,,ix) - ix)
FROM ta as A, #tb as B
WHERE SUBSTRING( , + id_value, ix, 1) = ,

drop table ta
drop table #tb