Nested table - how to reference internal column without a name??

Question

Hi guys, I've a question regarding nested tables - Ive searched around and cant find an answer.
Heres my sample code :
CREATE OR REPLACE TYPE scotttype AS table of number;
create table scott1 (col_a varchar2(10), col_b scotttype) nested table col_b store as col_b
insert into scott1 values ('onetwo',scotttype(1,2))
insert into scott1 values ('threefour',scotttype(3,4))
select t1.col_a, column_value col_b
from scott1 t1, TABLE(t1.col_b) t2
insert into table(select s.col_b FROM scott1 s WHERE s.col_a = 'onetwo')
values (5);Ok, so that seems fine.
If I want to do an update or delete though, how can I reference col_b as the nested table doesnt have a column name ?
Ie :
update table(select col_b from scott1 where col_a = 'onetwo') col_b
set col_b.XXXXX = 6
where col_b.XXXXX = 5won't work - so what do I put in place of the XXXXX ???
I'm sure its simple, but I can't find it!
Thanks all

Answer 1

SQL> select t1.col_a, column_value col_b
  2  from scott1 t1, TABLE(t1.col_b) t2;
COL_A           COL_B
onetwo              1
onetwo              2
threefour           3
threefour           4
onetwo              5
SQL> commit;
Commit complete.
SQL> update table(select col_b c1 from scott1 where col_a = 'onetwo') t1
  2  set column_value = 6
  3  where column_value= 5;
1 row updated.
SQL> commit;
Commit complete.
SQL>  select t1.col_a, column_value col_b
  2   from scott1 t1, TABLE(t1.col_b) t2;
COL_A           COL_B
onetwo              1
onetwo              2
threefour           3
threefour           4
onetwo              6
SQL>