SQL & PL/SQL :: How To Query For Columns Without Using Column Names

I have limited permissions and am unable to create temp tables.So I would like to use a cursor to "create" a table of sorts then access/query it. But this "table"/cursor would have no column names so how do I refer to the columns? Is there a way to refer to a column by column number rather than column name in a query:

select column1 from tablename where column2 = 'abc'?

Is there a way in a query/update/insert to refer to a column by column number rather than column name?

declare
cursor c1 is
select 'abc', '8-Apr-2013', pk_id from EMPLOYEE where pk_id = '153'
UNION
select '1xyz', '4-10-2013', pk_id from EMPLOYEE where pk_id = '154'
c1_val number;

[code]....