How to get the field names of a table

hi all,
i need to get all field names of a table. here i dont need any data. i need only field names.
initially i used this query, select * from tname;
the problem is if table have 1000 records, all records will be in memory.
how to get this one.
regards
pavan.

hi all,
thanks a lot. the query is working.
initially i given this query
select column_name from user_tab_columns where table_name='mytable';
but no rows selected.
and i tried with this,
select column_name from user_tab_columns where table_name='MYTABLE';
this is working fine.
thanks
pavan.

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