A column that counts the records......need some help

Question

say i have a table with values {a, b, c, d, f};
i want a column that counts the rows of these records with out putting the value manually.
COL1 COL2
0 a
1 b
2 c
3 d
4 f
I have created a data block (wizard) for inserting the values into the table. But i want it to insert the values in COL1 automatically. Seems easy but i dont seem to be able to figure this out...

Answer 1

with tab1 as
(select 'a' col2 from dual
union all
select 'b' col2 from dual
union all
select 'c' col2 from dual
union all
select 'd' col2 from dual
union all
select 'f' col2 from dual
-- End of test data
select rownum - 1 col1, col2 from
(select col2 from tab1 order by col2)
COL1 COL2
0 a
1 b
2 c
3 d
4 f Regards
Dmytro