PL/SQL :: Converting Multiple Column In Single?

need to create a table with single column by using select statement with multiple columns
For Ex- i have 1 row with 10 columns (may be more than 10) like
'A','B','C','D','E','F','G','H',I','J'
i written sql like
select 'A','B','C','D','E','F','G','H','I','J' from dual

result is - 'A','B','C','D','E','F','G','H','I','J' with 10 columns

Now i need output lik this using SQL
Text
------
'A'
'B'
'C'
'D'

[code]...

sort out this problem.