SQL & PL/SQL :: Script Store Data?

My requirement is to get primary key column name and there values of a table and store in a stage table

create table easy(id integer, event_rowid integer,txn_rowid integer,txn_name varchar2(200));

begin
for i in 1..5 loop
insert into easy values(i,'777'||i,i||89,'Ris'||i||i);

[code]...

I was able to fetch primary keys and there values for a table and store them in stage table but only 1 record , I am stuck when there are more than 1 record Here is what i tried

SQL> SET serveroutput ON
SQL> DECLARE
2 V_prim_key VARCHAR2(2000);
3 l_tab DBMS_UTILITY.uncl_array;

[code]...

If you look at the above code in the execute immediate where condition i have used id=1, which is 1 records only but if i change id <3 then there will be 2 records and i will get below error ORA-01422: exact fetch returns more than requested number of rows

Other problem if there are 3 primary keys as in above case i am fetching there values 1 by 1 , is there any way if i can fetch those values once in for all data to be stored in stage table in below format

TAB_NAME V_PEIM_KEY V_PRIM_DATA DT
------- --------- ------- ------
EASY TXN_NAME,EVENT_ROWID,ID Ris11,7771,1 10-Feb-13
EASY TXN_NAME,EVENT_ROWID,ID Ris22,7772,2 10-Feb-13