Another sql query--trigger

Question

I want to write a trigger, usig DUAL table if possible, which shows me the name of a user who make changes in a table.
User names are stored in "users" table (Smith, Jhon,etc,etc) and the trigger that I created looks like this:
CREATE OR REPLACE TRIGGER ITEMS_after_update
AFTER UPDATE
ON ITEMS
FOR EACH ROW
DECLARE
v_username varchar2(50);
BEGIN
-- Find username of person performing UPDATE into table
-- SELECT useFNAME INTO v_username
-- FROM USERS;
-- Insert record into audit table
INSERT INTO new_ITEMS
( ITEMKEY_new,
ITEMKEY,
ITEMNAME_new,
ITEMNAME,SORTGROUP,
SORTGROUP_new )
VALUES
( :new.ITEMKEY,
:OLD.ITEMKEY,
:NEW.ITEMNAME,
:OLD.ITEMNAME,
:new.SORTGROUP,
:OLD.SORTGROUP );
END;
If I'm using SELECT user INTO v_username FROM dual;
instead of SELECT useFNAME INTO v_username FROM USERS I get the "company1" name and doesn't help.I would like to receive Jhon or Smith....
Can anyone help me with this trigger ?
Regards
Robert B

Answer 1

Where exactly are you trying to derive the user from? Based on your query
"SELECT useFNAME INTO v_username FROM USERS;" that would bring back all rows from that table, which is not legitimate when using an INTO clause.
Maybe you are wanting to do something like this?
SELECT useFNAME INTO v_username
from USERS where USERNAME = USER
where USER is an Oracle function returning the user.