SQL & PL/SQL :: Way When Doing Rank Function In PL/SQL To Pass Field

there is a way when doing the Rank Function in PL/SQL to pass the field that will be ranked as an override.

SELECT rank(p_ColumnAmt) within group (order by p_ColumnNm desc) rank
INTO v_RnkNoAmt
FROM Table_name
WHERE ??????;

p_Column is the amount I am ranking
p_ColumnNm is the actual field name to Rank.

When I pass the field name with an override I do not get the correct rank back. If I run the Select with the actual field name curr_1_mth_amt, I get the correct rank.

I have about 70 different field to Rank and do not want to make a procedure for each field.