system events

[Jani]

In our company three user are perform actions on database, two users are with sysoper and one with sysdba role.
I wanna create triggers on startup and shutdown database, with user_name, action, terminal and datetime.
Also i wanna create logon and logoff triggers
plz examples

[anandkl]

U can query dba_audit_session.U will get the required information.

Before quering this table u need to set audit_trail init parameter to DB.Then u need to audit all the action u want to monitor like insert,update,delete,select,create etc..