巧妙利用连表查询拆分字符串

我有一个Table myTable (iName varchar(6),iDesc varchar(2000))
内容示例如下:
iName iDesc
A AGF/dfgh
B rty/fghjk/uyt/fghj
F rty/ghj/cvb
H uio/vbn/4567/678
...
即字段iDesc的内容由'/'字符分割,先想得到下面的结果:
iName iNewDesc
A AFG
A dfgh
B rty
B fghjk
B uyt
...
--以往解决方法,写一个函数然后循环拆,效率低

--先提供一个巧妙利用连表查询解决方法,如下:

--创建测试环境

Create Table Str_Test (iName varchar(6),iDesc varchar(2000))
insert into Str_Test select 'A','AGF/dfgh'
union all select 'B','rty/fghjk/uyt/fghj'
union all select 'F','rty/ghj/cvb'
union all select 'H','uio/vbn/4567/678'

--巧妙连表方法

select top 2000 id=identity(int,1,1) into # from syscolumns a,syscolumns b
select a.iName,
iNewDesc=substring(a.iDesc,b.id,charindex('/',a.iDesc+'/',b.id)-b.id)
from Str_Test a, # b
where substring('/'+a.iDesc,b.id,1)='/'
order by a.iName,b.id

drop table #

--查询结果

iName iNewDesc
--------- --------------
A AGF
A dfgh
B rty
B fghjk
B uyt
B fghj
F rty
F ghj
F cvb
H uio
H vbn
H 4567
H 678