How to audit system user logon , log off , database shutdown and startup (System Level Auditing)

Question

How to enable a system or database level auditing in Oracle using SQL commands or rather in SQLPlus. Something to do with table views such as dba_audit_session. Overall I'm looking for SQL statement that audits the logon or attempts the logon of users and database startup time or shutdown.

Answer 1

To audit logins and logouts create LOGON and LOGOFF triggers that populate a regular history table. I myself prefer it. It's far simpler:

create table log_trail (name varchar2(30), time date, action varchar2(10));

create or replace trigger tr_logon
after logon on database
begin
insert into log_trail values (user, sysdate, 'LOGON');
commit;
end tr_logon;

create or replace trigger tr_logoff
before logoff on database
begin
insert into log_trail values (user, sysdate, 'LOGOFF');
commit;
end tr_logon;

Notes:

• Beware of logon triggers. If they are not working, you may not logon to Oracle.

• You must have the CREATE (ANY) TRIGGER and ADMINISTER DATABASE TRIGGER privileges to implement DATABASE triggers