Please - Split Select From Table To Comma 1,2,3,...

help please
i have this table

number_row fld_index vtext
----------------------------------------
1 101 a
2 101 b
3 101 c
4 102 d
5 102 e
6 102 f
7 103 g
8 103 h
9 103 i
......
......
....
now i need to do this

SELECT fld_index
FROM table_index
GROUP BY fld_index

----------------------------
and i get

101
102
103
104
how split this select and do this

in('101' ,'102','103','104')
------------------------------



Code Snippet

DECLARE @aaa

set @aaa =(SELECT fld_index FROM table_index GROUP BY fld_index)

set fld1 = CASE WHEN fld1 in(@aaa ) then '*' else fld1 end ---- need to split the @aaa ,'101' ,'102' , '103','104' ,





----------------------------------------------------------------------------------------------------------------------------
instead of this update



update [dbo].[tb_pivot_big]

set fld1 = CASE WHEN fld1 in('101' ,'102','103','104') then '*' else fld1 end

, fld2 = CASE WHEN fld2 in('101' ,'102','103','104') then '*' else fld2 end

, fld3 = CASE WHEN fld3 in('101' ,'102','103','104') then '*' else fld3 end



, fld4 = CASE WHEN fld4 in('101' ,'102','103','104') then '*' else fld4 end



, fld5 = CASE WHEN fld5 in('101' ,'102','103','104') then '*' else fld5 end





from [dbo].[tb_pivot_big]